PDF Shop Manual Komatsu PC290LC-10 Hydraulic Excavator - 5 MB
This comprehensive shop manual is the definitive guide for servicing the Komatsu PC290LC-10 Hydraulic Excavator.
It contains detailed, factory-approved procedures for every aspect of repair and maintenance.
From the engine and hydraulics to the undercarriage and electronics, this manual provides the in-depth information needed by professional technicians.
Perform diagnostics, overhauls, and repairs with confidence using this essential resource.
PDF Viewer
Viewer loads when you scroll here
SHARE THIS MANUAL
Download the PDF Manual
PDF viewer loading area
Text Preview from This Manual
The text below was extracted from the visible preview pages to help you confirm the manual contents before download.
--- Page 1 ---
SEN05644-08
HYDRAULIC PC290LC -10
EXCAVATOR SERIAL NUMBERS 15001 and up
--- Page 3 ---
00 Index and foreword
Foreword, safety and general information
jump on or off the machine. When the scaffold is floor, wipe it off immediately. Fuel or oil on the
not provided, use steps or stepladder to secure floor can cause you to slip and can even cause
your footing. fires.
• As a general rule, do not use gasoline to wash
Precautions during work parts. Do not use gasoline to clean the electrical
• For the machine equipped with the battery parts, in particular.
disconnect switch, check that the system • Reinstall the parts removed to their original
operating lamp is turned off before starting the places. Replace the damaged parts and the
work. Then, turn the battery disconnect switch to parts which must not be used with new ones.
OFF (Q) position and remove the switch key. For When installing the hoses and wiring harnesses,
the machine not equipped with the battery be careful that they are not damaged by
disconnect switch, remove the cable from the contacting with other parts when the machine is
battery before starting the work. Be sure to operated.
remove the negative end (-) of the battery cable • When connecting the high pressure hoses and
first. tubes, make sure that they are not twisted. The
• Release the remaining pressure in the circuits damaged high pressure hoses and tubes are
completely before the work when the parts in the very dangerous when they are installed. So, be
circuits of oil, fuel, coolant and air are extremely careful when connecting the high
disconnected or removed. When the cap of the pressure pipings. In addition, check that their
oil filter, drain plug or oil pressure pickup plug is connections are correct.
removed, loose them slowly to prevent the oil • When assembling or installing the parts, be sure
from spurting out. to tighten the bolts to the specified torque. When
• When removing or installing the checking plug or installing the protective parts such as guards, or
the piping in the fuel circuit, wait 30 seconds or the parts which vibrate violently or rotate at high
longer after the engine is shut down and start speeds, be sure to check that they are installed
the work after the remaining pressure is correctly.
released from the fuel circuit. • When aligning 2 holes, never insert your fingers
• Immediately after the engine is shut down, the or hand into the holes. Align the holes with care
coolant and oil in the circuits are hot. Be careful so that your fingers are not caught in the hole.
not to get scalded by the hot coolant and oil. • When measuring hydraulic pressure, check that
Start the work after checking that the coolant the measuring tools are correctly installed.
and oil are cooled down sufficiently. • Pay attention to safety when removing and
• Start the work after the engine is shut down. Be installing the tracks of the track type machines.
sure to shut down the engine when working on When removing the track, it separates suddenly.
or around the rotating parts in particular. When The workers should not stand at either end of
checking the machine without shutting down the the track.
engine (measuring oil pressure, rotational speed, • If the engine is operated for a long time in a
oil or coolant temperature), take extreme care closed place which is not ventilated well, you
not to get caught in the rotating parts or the may suffer from gas poisoning. Accordingly,
working equipment. open the windows and doors to ventilate the
• The hoist or crane must be used to sling the place well.
components weighing 25 kg or heavier. Check
the slings (wire rope, nylon sling, chain and Precautions for slinging work and making
hook) for damage before the work. Use the signals
slings with ample capacity and install them to • Only one appointed worker must make signals
the proper places. Operate the hoist or crane and co-worker must communicate with each
slowly to prevent the component from hitting any other frequently. The appointed signaler must
other part. Do not work with any part still raised make specified signals clearly at the place
by the hoist or crane. where the signaler is well seen from the
• When removing the part which is under internal operator's seat and where the signaler can see
pressure or reaction force of the spring, always the working condition easily. The signaler must
leave 2 bolts in diagonal positions. Loosen those always stand in front of the load and guide the
2 bolts gradually and alternately and release the operator safely.
pressure, then, remove the part. 1. Do not stand under the load.
• When removing the part, be careful not to break 2. Do not step on the load.
or damage the electrical wiring. The damaged • Check the slings before starting sling work.
wiring may cause electrical fires. • Keep putting on the gloves during sling work.
• When removing piping, prevent the fuel or oil (Put on the leather gloves, if available.)
from spilling out. If any fuel or oil drips onto the
PC290LC-10 00-15
--- Page 4 ---
00 Index and foreword
Foreword, safety and general information
Type 3 (ALL-C930-925-P-03-A)
Disconnection Connection
1. While holding the fitting, push body (9) in straight 1. While holding the fitting, push body (9) in straight
until sliding prevention ring (8) hits contact until sliding prevention ring (8) hits contact
surface (b) at the hexagonal portion on the male surface (a) at the hexagonal portion on the male
side. (Fig. 10) side to connect them. (Fig. 13)
2. While keeping the condition of Step 1, push
cover (10) straight until it hits contact surface (b)
of the hexagonal portion on the male side. (Fig.
11)
3. While keeping the conditions of Steps 1 and 2,
pull out whole body (9) to disconnect it. (Fig. 12)
PC290LC-10 00-31
--- Page 5 ---
00 Index and foreword
Foreword, safety and general information
a When the hydraulic cylinder is used for the first time after reassembly of the hydraulic equipment such as
the hydraulic cylinder, pump, etc. and piping after removing them for repair, be sure to perform air bleeding
of the hydraulic circuit according to the following procedure.
1. Start the engine, and run it at low idle.
2. Repeat the operation to extend and retract each cylinder of the work equipment to approximately 100
mm before the stroke end 4 to 5 times.
3. Operate the hydraulic cylinder 3 to 4 times to the end of its stroke.
a After the completion of repair and when operating the machine which is stored long term, perform the air
bleeding with the same procedure as the one described above.
Precautions at the time of completing work
Refilling of coolant, oil and grease
• When the coolant is drained, tighten the drain valve securely, then refill the coolant reservoir with the
coolant Komatsu recommends to the specified level. Start the engine to circulate the coolant in the piping,
and add the coolant to the specified level again.
• When the hydraulic components are removed and installed, refill the oil reservoir with the oil Komatsu
recommends to the specified level. Start the engine to circulate the oil in the piping, and add the oil to the
specified level again.
• If the hydraulic piping or hydraulic equipment is removed, be sure to bleed air from the system after
rebuilding the parts, by referring to "Testing and adjusting".
• Supply the specified amount of grease to the work equipment parts.
Testing installed condition of cylinder heads and manifolds
• Check the cylinder head and intake and exhaust manifold mountings for looseness.
• If any bolt is loose, retighten it.
a For the tightening torques, see the "Disassembly and assembly".
Testing of engine piping for damage and looseness
Check the piping for damage, the mounting bolts and nuts for looseness, and the joints
Intake and exhaust for air suction and exhaust gas leakage.
system
If any part is loosely installed or damaged, retighten the bolts or repair the parts.
Check the piping for damage, the mounting bolts and nuts for looseness, and the joints
Cooling system for water leakage.
If any part is loosely installed or damaged, retighten the bolts or repair the parts.
Check the piping for damage, the mounting bolts and nuts for looseness, and the joints
Fuel system for fuel leakage.
If any part is loosely installed or damaged, retighten the bolts or repair the parts.
Check of KDPF or muffler and exhaust pipe for damage and looseness
• Visually check the KDPF or muffler, exhaust pipe and their mounting parts for a crack and damage. If any
part is damaged, replace it.
• Check the mounting bolts, nuts, and clamps of the KDPF or muffler, exhaust pipe and their mounting parts
for looseness.
If any part is loosely installed, retighten the bolts.
Check of KDPF or muffler function
• Check the KDPF or the muffler for unusual noise comparing to the noise when they are new.
If any unusual noise is heard, repair KDPF or muffler, referring to "Troubleshooting" and "Disassembly and
assembly".
PC290LC-10 00-47
--- Page 6 ---
00 Index and foreword
Foreword, safety and general information
kg/cm2 to lb/in22
1 kg/cm2 = 14.2233 lb/in22
0 1 2 3 4 5 6 7 8 9
0 0 14.2 28.4 42.7 56.9 71.1 85.3 99.6 113.8 128.0
10 142.2 156.5 170.7 184.9 199.1 213.4 227.6 241.8 256.0 270.2
20 284.5 298.7 312.9 327.1 341.4 355.6 369.8 384.0 398.3 412.5
30 426.7 440.9 455.1 469.4 483.6 497.8 512.0 526.3 540.5 554.7
40 568.9 583.2 597.4 611.6 625.8 640.1 654.3 668.5 682.7 696.9
50 711.2 725.4 739.6 753.8 768.1 782.3 796.5 810.7 825.0 839.2
60 853.4 867.6 881.8 896.1 910.3 924.5 938.7 953.0 967.2 981.4
70 995.6 1,010 1,024 1,038 1,053 1,067 1,081 1,095 1,109 1,124
80 1,138 1,152 1,166 1,181 1,195 1,209 1,223 1,237 1,252 1,266
90 1,280 1,294 1,309 1,323 1,337 1,351 1,365 1,380 1,394 1,408
100 1,422 1,437 1,451 1,465 1,479 1,493 1,508 1,522 1,536 1,550
110 1,565 1,579 1,593 1,607 1,621 1,636 1,650 1,664 1,678 1,693
120 1,707 1,721 1,735 1,749 1,764 1,778 1,792 1,806 1,821 1,835
130 1,849 1,863 1,877 1,892 1,906 1,920 1,934 1,949 1,963 1,977
140 1,991 2,005 2,020 2,034 2,048 2,062 2,077 2,091 2,105 2,119
150 2,134 2,148 2,162 2,176 2,190 2,205 2,219 2,233 2,247 2,262
160 2,276 2,290 2,304 2,318 2,333 2,347 2,361 2,375 2,389 2,404
170 2,418 2,432 2,446 2,460 2,475 2,489 2,503 2,518 2,532 2,546
180 2,560 2,574 2,589 2,603 2,617 2,631 2,646 2,660 2,674 2,688
190 2,702 2,717 2,731 2,745 2,759 2,773 2,788 2,802 2,816 2,830
200 2,845 2,859 2,873 2,887 2,901 2,916 2,930 2,944 2,958 2,973
210 2,987 3,001 3,015 3,030 3,044 3,058 3,072 3,086 3,101 3,115
220 3,129 3,143 3,158 3,172 3,186 3,200 3,214 3,229 3,243 3,257
230 3,271 3,286 3,300 3,314 3,328 3,343 3,357 3,371 3,385 3,399
240 3,414 3,428 3,442 3,456 3,470 3,485 3,499 3,513 3,527 3,542
PC290LC-10 00-63
--- Page 7 ---
10 Structure and function
KVGT
KVGT (WA380-AA10-041-K-00-A)
a KVGT: Abbreviation for Komatsu Variable Geometry Turbocharger
a The shape is subject to machine models.
PC290LC-10 10-5
--- Page 8 ---
10 Structure and function
KCCV layout drawing
Operation (ENG107-A180-044-K-00-A)
a The figure on the left shows the flow of blowby gas released to the atmosphere from conventional engines.
The figure on the right shows the flow of blowby gas recirculated to the intake system by the KCCV
ventilator.
1. Air cleaner
2. KVGT
3. Aftercooler
4. Cylinder block (crankcase)
5. Breather
6. KCCV ventilator
7. Oil pan
• Engine oil mist is removed from blowby gas (A) in cylinder block (4) by the filter in KCCV ventilator (6), and
then the cleaned gas (B) is recirculated to the intake side of the KVGT.
• Removed engine oil (C) flows through a check valve and falls to the oil pan.
PC290LC-10 10-21
--- Page 9 ---
10 Structure and function
Track frame and idler cushion
Undercarriage and frame (ALL-DT00-001-K-00-A)
Track frame and idler cushion (PC290-DT20-041-K-00-A)
1. Idler
2. Track frame
3. Carrier roller
4. Final drive
5. Track roller
6. Track shoe
7. Center guard
8. Idler cushion
9. Front guard
Specifications (PC290-DT20-030-K-00-A)
• Number of track rollers
PC290LC-10 10-37
--- Page 10 ---
10 Structure and function
Main pump
15. Spline
16. Bearing
17. LS valve
Outline
• This pump consists of two variable capacity swash plate piston pumps, PC valve, LS valve, EPC valve,
and swash plate sensor.
Function
• The pump converts the engine speed and torque transmitted to its shaft (1) into oil pressure and delivers
pressurized oil corresponding to the load.
• It is possible to change the discharged volume by changing the swash plate angle.
Structure
• Cylinder block (7) is supported to shaft (1) by spline (15).
• Shaft (1) is supported by each bearing (16) at the front and rear.
• The tip of piston (6) is shaped as a concave sphere and is crimped together with shoe (5).
• Piston (6) and shoe (5) constitute a spherical bearing.
• Rocker cam (4) has flat surface (A), and shoe (5) is always pressed against this surface while sliding in a
circular pattern.
• Rocker cam (4) transmits high pressure oil to cylindrical surface (B) with cradle (2), which is secured to the
case, and forms a static pressure bearing when it slides.
• Piston (6) performs reciprocal motion in the axial direction inside each cylinder chamber of cylinder block
(7).
• Cylinder block (7) seals the pressurized oil to valve plate (8) and performs relative rotation.
• The oil pressure balance on the valve plate is maintained properly.
• The pressurized oil is sucked in and discharged from each cylinder chamber in cylinder block (7) through
valve plate (8).
Operation (PC220-C200-044-K-00-A)
• Cylinder block (7) rotates together with shaft (1) and shoe (5) slides on plane (A).
• Rocker cam (4) moves along cylindrical surface (B). As a result, angle (a) between center line (X) of
rocker cam (4) and the axis of cylinder block (7) changes.
• Angle (a) is called the swash plate angle.
• If swash plate angle (a) is made between center line (X) of rocker cam (4) and the axis of cylinder block (7),
plane (A) functions as a cam against shoe (5).
• Piston (6) reciprocates inside cylinder block (7) and a difference is made between volumes (E) and (F) in
cylinder block (7).
• Each piston (6) sucks and discharges oil by (F) - (E).
• Oil is discharged while cylinder block (7) rotates and the volume of chamber (E) decreases.
• The volume of chamber (F) grows larger and, in this process, the oil is sucked.
PC290LC-10 10-53
--- Page 11 ---
10 Structure and function
Main pump
LS(PC)-EPC valve (PC-C2M0-041-K-00-A)
LS: Abbreviation for Load Sensing
PC: Abbreviation for Pressure Compensation
EPC: Abbreviation for Electromagnetic Proportional Control
PC290LC-10 10-69
--- Page 12 ---
10 Structure and function
Control valve
Service valve
1. LS shuttle valve
2. Pressure compensation valve
3. Spool
4. 2-stage suction safety valve
5. Suction safety valve
6. Unload valve
7. Main relief valve
8. LS bypass plug
Structure
• The control valves of the following types are set.
6-spool valve (without service valve)
7-spool valve (6-spool valve with service valve)
• This control valve consists of a 6-spool valve (unit type) and a set of service valve. A merge-divider valve,
a variable back pressure valve and a boom hydraulic drift prevention valve are installed to it.
• Since all the valves are assembled together with connecting bolts and their passes are connected to each
other inside the assembly, the assembly is compact and easy to maintain.
• With one spool provided for one work equipment, this control valve is simple in structure.
PC290LC-10 10-85
--- Page 13 ---
10 Structure and function
Control valve
Operation
• Since drive signal (IS1) of the EPC valve for the main spool is OFF, the output pressure of the pump
merge-divider EPC valve is 0 MPa {0 kg/cm2}.
• Main spool (1) is pressed to the right by spring (2). As a result, ports (E) and (F) are interconnected.
• Pressurized oil (P1) and (P2) discharged from the two pumps merge at ports (E) and (F), and flow to the
control valve which requires the oil.
• Since drive signal (IS2) of the EPC valve for LS spool (3) is also OFF, LS spool (3) is pressed to the right
by spring (4). As a result, ports (A) and (B) are interconnected and ports (B) and (C) are interconnected.
• The LS pressures transmitted from respective control valve spools through LS circuits (A), (B), (C), and
(D) are transmitted to all the pressure compensation valves.
When oil flowing from two pumps are divided [pump merge-divider valve changeover signals (IS1)
and (IS2) are ON]
Operation
• Since drive signal (IS1) of the main spool is ON, main spool (1) is moved to the left by the output pressure
from the pump merge-divider EPC valve. As a result, port (E) is disconnected from port (F).
• The pressurized oil from the two pumps are sent to respective control valve groups.
Pressure P1: To bucket, left travel, boom
Pressure P2: To swing, right travel, arm
• When drive signal (IS2) of the EPC valve for LS spool (3) becomes ON, LS spool (3) is also moved to the
left by the output pressure from the pump merge-divider EPC valve. As a result, ports (A) and (C) are
interconnected, and other ports remain disconnected from each other.
• The LS pressures transmitted from respective control valve spools through LS circuits (A), (B), (C), and
(D) are transmitted to respective control valves.
PC290LC-10 10-101
--- Page 14 ---
10 Structure and function
Control valve
In arm "NEUTRAL" operation
• When the arm is operated to "NEUTRAL" position, the pressurized oil flowing inside poppet (5) through
orifice (a) of poppet (5) is stopped by pilot piston (2).
• The holding pressure of arm cylinder head exerts a right-hand force on the left side of ring-shaped area
(S), of which outside diameter is equal to diameter (d1) of poppet (5) and of which inside diameter is equal
to seat diameter (d2).
• The combined force of right-hand force on area (S) and the reaction force of spring (4) moves poppet (5)
to the right.
• The circuit from control valve to arm cylinder head shuts off, then the oil pressure of the arm cylinder head
side is kept.
PC290LC-10 10-117
--- Page 15 ---
10 Structure and function
Swing motor
When swing is stopped
• When the swing control lever is returned to "NEUTRAL" from "swing RIGHT" position, the supply of
pressurized oil from the pump to port (MA) is stopped.
• The pressurized oil from the motor outlet cannot return to the tank since the return circuit to the tank is
blocked by control valve (6). Thus, pressure in port (MB) increases.
• If the pressure in port (MB) becomes too high, the pressurized oil returns to the hydraulic tank through
relief valve (1) and port (S).
• Rotation resistance is exerted on the motor and the brake starts working.
• If the pressure in port (MB) becomes higher than that in port (MA), it presses shuttle valve (4).
• The pressure in chamber (C) becomes the same as that in port (MB), and increases to the set pressure of
relief valve (1).
• A high braking torque works on the motor, thereby stopping the motor.
• While relief valve (1) is actuated, the relieved pressurized oil and the pressurized oil from port (S) are
routed to port (MA) through the check valve (3).
• Thus, cavitations in port (MA) is prevented.
PC290LC-10 10-133
--- Page 16 ---
10 Structure and function
Travel motor
Braking while travelling downhill
• If the machine tries to run away when traveling downhill, the motor will turn under no load, so the pressure
at the motor inlet port will drop, and the pressure in chamber (S1) through orifices (E1) and (E2) will also
drop. When the pressure in chamber (S1) drops below the spool switching pressure, spool (19) is returned
to the left, in the direction of the arrow by spring (20), and outlet port (MB) is throttled.
As a result, the pressure at the outlet port side rises, resistance is generated to the rotation of the motor,
and this prevents the machine from running away.
In other words, the spool moves to a position where the pressure at the outlet port (MB) balances the
pressure at the inlet port and the force generated by the weight of the machine. It throttles the outlet port
circuit and controls the travel speed according to the amount of oil discharged from the pump.
Suction safety valve (PC290-C660-042-K-00-A)
Function
• When travel is stopped (or when traveling downhill), the circuits at the inlet and outlet ports of the motor
are closed by the counterbalance valve. However, the motor is rotated by inertia, so the pressure at the
outlet port of the motor will become abnormally high and damage the motor or piping. The safety valve
PC290LC-10 10-149
--- Page 17 ---
10 Structure and function
PPC valve
When control lever is fully operated
• Lever (5) pushes down piston (4), and retainer (9) pushes down spool (1).
• Fine control hole (f) is disconnected from drain chamber (D) and connected to pump pressure chamber
(PP).
• The pilot pressure oil from the self-pressure reducing valve passes through fine control hole (f) and flows
from port (P1) to port (A) and pushes the control valve spool.
• The oil returning from port (B) flows from port (P2) through fine control hole (f') into drain chamber (D).
1st-line attachment PPC valve (with EPC valve) (PC-PL29-041-K-00-A)
(if equipped)
PPC: Abbreviation for Proportional Pressure Control
EPC: Abbreviation for Electromagnetic Proportional Control
a For details of operation, see "Work equipment and swing PPC valve".
PC290LC-10 10-165
--- Page 18 ---
10 Structure and function
Attachment circuit selector valve (for low pressure
circuit)
When breaker is installed
• Pilot pressure (PI) from the attachment circuit selector solenoid valve compresses spring (2), and spool (1)
moves to the right to its stroke end.
• Port (ATT) is disconnected from port (V) and is interconnected to port (T).
• The pressurized oil returning from the breaker returns directly to the hydraulic tank via port (T) without
passing through the control valve.
PC290LC-10 10-181
--- Page 19 ---
10 Structure and function
Electrical control system
Control method in each mode
P, E, L, ATT-P and ATT-E modes
Matching point
Working mode Matching point
P and ATT-P 127.1kW/1,750 rpm
(During work) {170 HP/1,750 rpm}
E and ATT-E 108.2 kW/1,750 rpm
(During work) {145 HP/1,750 rpm}
• In P, E, ATT-P and ATT-E modes, the engine speed is always controlled so that it is kept around the
matching point specified for each mode.
• At light loads, the engine operates at high speeds. As the load increases, the engine speed decreases
while the torque is increased, until the matching point with pump absorption torque upper limit (PT) is
reached. [See (1) in graph]
• As the load increases further, the engine speed decreases further. [See (2) in graph]
• The controller lowers the pump absorption upper limit torque (PT) to reduce the load on the engine. [See
(3) in graph]
PC290LC-10 10-197
--- Page 20 ---
10 Structure and function
Electrical control system
1. Battery disconnect switch
2. Battery
3. Battery relay
4. Fusible link
5. Fuse box
6. Swing brake cancel switch
7. Swing lock switch
8. Pump controller
9. Machine monitor
10. Oil pressure switch
11. Oil pressure sensor
12. Main pump
13. Control valve
13a. Self-pressure reducing valve
13b. Merge-divider valve
13c. Travel junction valve
14. Swing motor
14a. 2-stage relief valve
15. Swing holding brake solenoid valve
16. 2-stage swing relief solenoid valve
Input and output signals
a. Swing brake cancel switch signal
b. Swing holding brake solenoid valve drive signal
c. CAN signal
d. Swing lock switch signal
e. 2-stage swing relief solenoid valve drive signal
f. Oil pressure sensor signal
g. Oil pressure switch signal
Function
Swing lock and swing holding brake function
• On machines with swing lock (manual), swing can be locked at any position by turning swing lock switch
(1) to "ON" position.
• Interlocked with the swing operation, the swing holding brake (automatic lock) prevents hydraulic drift from
occurring after the swing stops.
• Interlocked with the L.H. and R.H. work equipment control levers and attachment control pedals
operations, the swing holding brake is canceled to reduce the load on the swing equipment during
excavation work.
PC290LC-10 10-213
--- Page 21 ---
10 Structure and function
Electrical control system
Pin No. Signal name Input/Output signal
70 (*1) —
71 (*1) —
72 R.H. travel FORWARD PPC oil pressure sensor Input
73 (*1) —
74 (*1) —
75 Wiper motor stop (P) Input
76 Cab front window open limit switch Input
77 Model selection 4 Input
78 (*1) —
79 PPC lock switch Input
80 Starting switch ACC signal Input
81 (*1) —
*1: Never connect these pins. Malfunctions or failures may occur.
AMP-40P [CN-CP02]
Pin No. Signal name Input/Output signal
82 (*1) —
83 (*1) —
84 (*1) —
85 Travel junction solenoid valve Output
86 Attachment selector solenoid valve Output
87 (*1) —
88 LS-EPC valve Output
89 Pump merge-divider EPC valve (LS) Output
90 (*1) —
91 (*1) —
92 (*1) —
93 Travel speed increase solenoid valve Output
94 Swing 2-stage relief solenoid valve Output
95 (*1) —
96 Front pump PC-EPC valve Output
97 Attachment oil flow rate adjustment EPC valve Output
98 (*1) —
99 (*1) —
100 System-in-use signal Output
101 Swing holding brake solenoid valve Output
102 (*1) —
103 (*1) —
104 Rear pump PC-EPC valve Output
105 (*1) —
106 (*1) —
107 Travel alarm Output
108 Battery relay drive Output
109 2-stage relief solenoid valve Output
110 (*1) —
111 (*1) —
112 Pump merge-divider EPC valve (main) Output
113 Variable back pressure solenoid valve Output
114 Wiper motor (-) Output