PDF Service Manual CASE CX130D Crawler Excavator - 15 MB
This comprehensive service manual is for the CASE CX130D Crawler Excavator, including the LC and Standard with Blade versions (Tier 4B final).
It provides technicians with the detailed information needed for maintenance and repair.
The manual contains specifications, troubleshooting steps, and complete disassembly/reassembly procedures.
It is an essential tool for any professional mechanic working on the CX130D series.
Ensure your repairs are done to factory standards with this guide.
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--- Page 1 ---
CX130D - LC Version
CX130D - Standard with Blade Version
Tier 4B (final)
Crawler Excavator
SERVICE MANUAL
Printed in U.S.A.
© 2015 CNH Industrial Italia S.p.A. All Rights Reserved. Part number 47896670
Case is a trademark registered in the United States and many 1st edition English
other countries, owned by or licensed to CNH Industrial N.V.,
its subsidiaries or affiliates. July 2015
--- Page 3 ---
INTRODUCTION
Digging force (with 0.5 m³ bucket) ( ISO 6015 )
[ 2.50 m (8.2021 ft)] Arm [ 3.01 m (9.8753 ft)] Arm [ 2.11 m (6.9226 ft)] Arm
Arm digging force 62 kN (13938.15 lb) 56 kN (12589.30 lb) 70 kN (15736.63 lb)
With auto power up 66 kN (14837.39 lb) 60 kN (13488.54 lb) 74 kN (16635.86 lb)
Bucket digging force 90 kN (20232.80 lb) 90 kN (20232.80 lb) 90 kN (20232.80 lb)
With auto power up 95 kN (21356.85 lb) 95 kN (21356.85 lb) 95 kN (21356.85 lb)
Dimensions
[ 2.50 m (8.2021 ft)] Arm [ 3.01 m (9.8753 ft)] Arm [ 2.11 m (6.9226 ft)] Arm
Overall length (without attachment) 4030 mm (158.661 in) 4030 mm (158.661 in) 4030 mm (158.661 in)
Overall length (with attachment) 7650 mm (301.181 in) 7640 mm (300.787 in) 7640 mm (300.787 in)
Overall height (to top of boom) 2770 mm (109.055 in) 2640 mm (103.937 in) 2680 mm (105.512 in)
Overall height (to top of Cab) 2830 mm (111.417 in) 2830 mm (111.417 in) 2830 mm (111.417 in)
Overall height (to top of handrail) 2810 mm (110.630 in) 2810 mm (110.630 in) 2810 mm (110.630 in)
Upper structure overall width 2530 mm (99.606 in) 2530 mm (99.606 in) 2530 mm (99.606 in)
Swing (rear end) radius 2170 mm (85.433 in) 2170 mm (85.433 in) 2170 mm (85.433 in)
Clearance height under upper
structure 895 mm (35.236 in) 895 mm (35.236 in) 895 mm (35.236 in)
Minimum ground clearance 420 mm (16.535 in) 420 mm (16.535 in) 420 mm (16.535 in)
Wheel base (Center to center of
wheels) 3040 mm (119.685 in) 3040 mm (119.685 in) 3040 mm (119.685 in)
Crawler overall length 3760 mm (148.031 in) 3760 mm (148.031 in) 3760 mm (148.031 in)
Track gauge 1990 mm (78.346 in) 1990 mm (78.346 in) 1990 mm (78.346 in)
Undercarriage overall width [with
600 mm (23.622 in) shoes] 2590 mm (101.969 in) 2590 mm (101.969 in) 2590 mm (101.969 in)
Crawler tracks height 780 mm (30.709 in) 780 mm (30.709 in) 780 mm (30.709 in)
Working ranges
[ 2.50 m (8.2021 ft)] Arm [ 3.01 m (9.8753 ft)] Arm [ 2.11 m (6.9226 ft)] Arm
Boom length 4630 mm (182.283 in) 4630 mm (182.283 in) 4630 mm (182.283 in)
Bucket radius 1200 mm (47.244 in) 1200 mm (47.244 in) 1200 mm (47.244 in)
Bucket wrist action 178 ° 178 ° 178 °
Maximum reach at GRP 8170 mm (321.654 in) 8640 mm (340.157 in) 7810 mm (307.480 in)
Maximum reach 8310 mm (327.165 in) 8770 mm (345.276 in) 7960 mm (313.386 in)
Max. digging depth 5550 mm (218.504 in) 6050 mm (238.189 in) 5160 mm (203.150 in)
Max. digging height 8770 mm (345.276 in) 9050 mm (356.299 in) 8550 mm (336.614 in)
Max. dumping height 6390 mm (251.575 in) 6680 mm (262.992 in) 6170 mm (242.913 in)
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--- Page 4 ---
INTRODUCTION
Short Arm [ 2.11 m (6.9226 ft)]
NOTE: Numbers are subject to change without notice due to design change or other reason.
NOTE: The diagram gives values that include the shoe lug height “a” [ 20 mm (0.787 in)].
SMIL15CEX4387GB 2
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--- Page 5 ---
Contents
Engine - 10
Engine and crankcase - 001
TECHNICAL DATA
Engine
General specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FUNCTIONAL DATA
Engine
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Static description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SERVICE
Engine
Prepare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Check - Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Test - Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Compression test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Crankcase
Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Inspect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
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Engine - Engine and crankcase
Idle gear D removal
1. Remove idle gear D (3) from the gear case cover.
• Remove idle gear D (3) together with the sprocket.
1. Bolt
2. Washer
4. Idle gear shaft
LPIL12CX00729AA 32
LPIL12CX00730AB 33
Timing chain removal
1. Remove the timing chain from the sprocket.
• Remove from the supply pump sprocket.
Timing chain guide removal
1. Remove the timing chain guide from the cylinder head.
LPIL12CX00731AA 34
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Engine - Engine and crankcase
Leak-off pipe installation
1. Install the fuel leak-off pipe to the fuel supply pump and
common rail assembly.
• Also install the hose at the same time.
NOTE: Do not reuse the gasket.
1. Leak-off pipe, hose
Tightening torque: 10.3 N·m (8 lb ft) eyebolt
LPIL12CX01123AB 53
Fuel pipe installation
1. Temporarily tighten the fuel pipe (1) to the common rail
assembly.
NOTE: Do not reuse the fuel pipe (1).
2. Temporarily tighten the fuel pipe (1) to the fuel supply
pump.
3. Securely tighten the fuel pipe (1) to the common rail
assembly.
Tightening torque: 44 N·m (32 lb ft) sleeve nut
4. Temporarily tighten the fuel pipe (1) to the fuel supply
pump.
Tightening torque: 44 N·m (32 lb ft) sleeve nut LPIL12CX01124AB 54
Water pump assembly installation
1. Install the water pump to the timing gear case.
• Install a new gasket by aligning with the front cover
stud.
• Install the water pump by aligning with the front cover
stud.
• Tighten the installation bolt and nut to their specified
torque.
Tightening torque: 25 N·m (18 lb ft)
LPIL12CX01125AA 55
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--- Page 8 ---
Index
Engine - 10
Pan and covers - 102
Engine oil pan - Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Engine oil pan - Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pan and covers - Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pan and covers - Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
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--- Page 9 ---
Engine - Valve drive and gears
5. Prepare the head bolt.
NOTE: Apply molybdenum disulfide grease to the seat sur-
face and threaded portion of the M14 head bolts.
NOTE: Apply engine oil to the seat surface and threaded
portion of the M10 head bolts.
6. Tighten the head bolt using the torque wrench.
Tightening torque: 157 N·m (116 lb ft)
7. Tighten the head bolt using the torque wrench.
Tightening torque: 165 N·m (122 lb ft)
Special tool: Angle gauge (Refer to Cylinder heads - SMIL13CEX1683AA 25
Special tools (10.101))
8. Tighten the head bolt using the special tool.
Tightening angle: 55 ° M14 bolt
9. Tighten the head bolt using the torque wrench.
Tightening torque: 38 N·m (28 lb ft) M10 bolt
10. Tighten the head bolt using the torque wrench.
Tightening torque: 167 N·m (123 lb ft) check the
tightening M14 bolt
Bridge installation
1. Apply the engine oil to the bridge.
2. Install the bridge to the bridge guide.
NOTE: Confirm that the bridge moves smoothly.
3. Apply the engine oil to the bridge cap.
4. Install the bridge cap to the bridge.
NOTICE: Be careful not to drop the bridge cap into the
engine.
SMIL13CEX1684AA 26
Camshaft installation
1. Align No. 1 cylinder to the compression top dead cen-
ter.
1. Front cover marking
2. 0° marking on the crankshaft damper
2. Apply the engine oil to the camshaft bearing.
NOTE: Apply engine oil to the sliding surface of the bear-
ing.
NOTE: Apply engine oil after cleaning the bearing installa-
tion sections of the camshaft bearing and cylinder head.
SMIL13CEX1685AB 27
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Engine - Cylinder heads
Cylinder head cover removal
1. Disconnect the PCV hose or the oil separator hose (2)
from the cylinder head cover.
2. Remove the oil filler pipe (1) from the cylinder head
cover.
1. Oil filler pipe
2. Oil separator hose
SMIL15CEX9596BB 4
3. Remove the cylinder head cover (1) from the cylinder
head.
1. Cylinder head cover
2. Cylinder head cover gasket
3. Oil seal
NOTICE: Do not damage the lip section of the oil seal with
the connector of the injector.
SMIL15CEX9597AB 5
Oil seal removal
1. Remove the oil seal (2) from the cylinder head cover
(1ì).
NOTE: When removing the oil seal from the cylinder head
cover, remove it from under the cylinder head cover.
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--- Page 11 ---
Engine - Cylinder heads
4. Apply the engine oil to the bolt.
• Apply engine oil to the threaded portion and tighten
the bearing cap.
• Tighten the bearing cap to the specified torque in the
order shown in the diagram.
Tightening torque: 18 N·m (13 lb ft)
LPIL12CX00644AA 21
5. Remove the bolt from the camshaft gear.
• Remove the M5 bolt of the camshaft gear.
LPIL12CX00645AA 22
• After rotating the crankshaft 720˚, the marks on the
collared end of the crankshaft and that of the bearing
cap should align.
1. Exhaust camshaft gear
2. Inlet camshaft gear
3. Idle gear D
LPIL12CX00646AB 23
Rocker arm adjustment
1. Loosen the adjust screw using special tool.
Special tool: Valve clearance adjust nut wrench
(Refer to Crankshaft - Special tools (10.103))
LPIL12CX00647AA 24
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Engine - Fuel tanks
Fuel tank - Prepare
WARNING
Chemical hazard!
When handling fuel, lubricants, and other service chemicals, follow the manufacturer's instructions.
Wear Personal Protective Equipment (PPE) as instructed. Do not smoke or use open flame. Collect
fluids in proper containers. Obey all local and environmental regulations when disposing of chemi-
cals.
Failure to comply could result in death or serious injury.
W0371A
WARNING
Avoid injury!
Shut off the engine, remove the key, and make sure all motion is stopped before servicing the machine.
Failure to comply could result in death or serious injury.
W1128A
WARNING
Escaping fluid!
Hydraulic fluid or diesel fuel leaking under pressure can penetrate the skin and cause infection or
other injury. To prevent personal injury: Relieve all pressure before disconnecting fluid lines or per-
forming work on the hydraulic system. Before applying pressure, make sure all connections are tight
and all components are in good condition. Never use your hand to check for suspected leaks under
pressure. Use a piece of cardboard or wood for this purpose. If injured by leaking fluid, see your
doctor immediately.
Failure to comply could result in death or serious injury.
W0178A
WARNING
Crushing hazard!
The lifting systems must be operated by qualified personnel who are aware of the correct procedures
to follow. Make sure all lifting equipment is in good condition, and all hooks are equipped with safety
latches.
Failure to comply could result in death or serious injury.
W0256A
WARNING
Heavy objects!
Lift and handle all heavy components using lifting equipment with adequate capacity. Always support
units or parts with suitable slings or hooks. Make sure the work area is clear of all bystanders.
Failure to comply could result in death or serious injury.
W0398A
Items to prepare:
• Wrenches [ 13 mm, 19 mm, 24 mm]
• Eyebolts ( M12 x 4)
• Shackle (with the required lifting capacity) x 4
• Wire rope (with the required breaking load)
• Lifting equipment (with the required lifting capacity)
• Cap
• Plug
• Drum can (for draining fuel)
• Rag
• Cleaning fluid
• Wood plank
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Engine - Fuel injection system
Fuel injection system - Bleed
Fuel air bleed (with element replaceable specification)
NOTICE: To prevent engine failure, be sure to perform
air removal after the installation or removal of fuel system
parts.
1. Priming pump
2. Air bleeding plug
3. Drain plug
4. Case
5. Fuel filter element
SMIL14CEX3106AB 1
1. Prepare the pan.
2. Turn ON the ignition switch.
3. Loosen the air bleeding plug (2) using a wrench.
4. Operate the priming pump (1).
NOTE: Operate the priming pump (1) until fuel comes out
from around the plug (2).
5. Tighten the air bleeding plug (2) using a wrench.
6. Operate the priming pump (1).
Number of times: 10 count(s) or more
NOTE: Wait for approximately 1 min after operating the
priming pump (1).
7. Loosen the air bleeding plug (2) using a wrench.
NOTE: Remove the air in the fuel filter element (5).
Repeat steps 3 to 7 until air no longer bleeds from the air
bleeding plug (2).
NOTE: Perform at least 3 times.
8. Tighten the air bleeding plug (2) using a wrench.
Tightening torque: 10 N·m (89 lb in)
9. Remove the fuel around the air bleeding plug (2) thor-
oughly after tightening.
10. Start the engine.
11. Idle the engine for 5 s. Do not change the engine
speed when the engine is started. If the engine does
not start, repeat the process from step 2 .
12. Slowly increase the engine speed, and maintain it for
3 min.
13. Accelerate the engine speed to maximum.
14. Stop the engine.
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Index
Engine - 10
Fuel injection system - 218
Common rail - Component identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Common rail - Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Common rail - Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Fuel injection system - Bleed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Fuel injection system - Component identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fuel injection system - Inspect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fuel injectors - Component identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Fuel injectors - Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Fuel injectors - Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Fuel injectors - Special tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
High pressure pump - Component identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
High pressure pump - Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
High pressure pump - Remove . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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Engine - Selective Catalytic Reduction (SCR) exhaust treatment
SMIL15CEX9619GB 2
1. Front chamber
2. Exhaust gas temperature sensor 3
3. SCR catalyst
4. Exhaust silencer
5. NOx sensor
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Engine - Exhaust Gas Recirculation (EGR) exhaust treatment
Exhaust Gas Recirculation (EGR) valve - Install
EGR valve installation
1. Install the EGR valve (1) on the inlet manifold.
Tightening torque: 27 N·m (19.9 lb ft)
2. Connect the harness connector to the EGR valve (1) .
SMIL15CEX9622AB 1
Battery ground cable connect
1. Connect the battery ground cable to the battery.
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Engine - Engine cooling system
Water pump - Inspect
1. Inspect the water pump assembly for:
• Cracks and damage on the water pump body
• Cracks and corrosion on the impeller
• Water leak from the seal unit
2. If any abnormality is found in the inspection, replace
the water pump assembly.
3. Inspect the bearing unit.
• Rotate the fan while pushing the fan center to the ra-
dius direction and inspect for any significant loose-
ness or abnormal sounds.
4. If any abnormality is found in the inspection, replace
the water pump assembly.
SMIL14CEX3226AA 1
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--- Page 18 ---
Engine - Engine lubrication system
2. Disconnect the vacuum hose (1) from the vacuum
pump (4).
3. Remove the oil feed pipe (2) from the vacuum pump (4)
and cylinder block.
4. Remove the vacuum pump (4) from the gear case cover
(3).
LPPH12CX00256AB 8
Gear case cover removal
1. Remove the cover from the gear case cover.
1. Power steering pump hole cover
LPIL12CX00257AB 9
2. Remove the gear case cover from the gear case.
LPIL12CX00258AA 10
Crank gear removal
1. Install the bolt to idle gear A.
• Install an M6 bolt to idle gear A and fasten it while
aligning the position of the sub gear.
2. Remove the crank gear from the crankshaft.
LPIL12CX00259AA 11
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--- Page 19 ---
Hydraulic systems - Hydraulic systems
Pressure line Pilot tank line
Tank line Electric line
Pilot pressure line
1. Travel motor 16. Lever lock
2. Boom (up) 17. Console lever lock switch
3. Boom (down) 18. 4 stack solenoid valve
4. Cushion valve 19. Hydraulic pump
5. Remote control valve (boom, bucket) 20. Travel remote control valve
6. Control valve 21. Backward left
7. Travel (right) 22. Forward left
8. Travel (left) 23. Forward right
9. Straight travel valve 24. Backward right
10. Proportional valve 25. Oil cooler
11. Check with travel merge orifice 26. Check valve
12. Boom (down) 27. Boom cylinder
13. Boom (up) 28. Main computer
14. Travel mode select switch 29. Travel pilot pressure sensor
15. Travel high speed 30. Boom-up pilot pressure sensor
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Hydraulic systems - Hydraulic systems
BOOM-UP SPOOL STROKE CONTROL CIRCUIT (COMPOUND BOOM-UP + ARM-IN) (WITH
HBCV)
As an example, this section explains the boom-up + arm-in compound operation (digging work).
The purpose is to increase the oil amount fed to the arm by pushing back the boom (2) spool during digging operation.
By operating the remote control valve to the boom-up side and arm-in side, the pilot pressure oil is fed via the cushion
valve to the control valve 4b2, 5a3 ports and 5b52, 4a4 ports and switches the boom (1) (2) and arm (1) (2) spools.
The discharge oil from hydraulic pump A1 enters the control valve PR (P1) port and is fed from the parallel oil path to
the boom (2) and arm (1) spools.
The oil goes through the arm (1) spool and flows into the arm cylinder bottom side.
At this time, the boom (2) spool is pushed back by the boom regeneration proportional valve, making arm-in operation
movement smooth.
The arm cylinder rod side return oil goes through the load holding valve check valve and the arm (1) spool, and returns
to the hydraulic tank.
The discharge oil from hydraulic pump A2 enters the control valve PL (P2) port and is fed from the parallel oil path to
the boom (1)spool.
Switching the spool lets the oil flow through the boom load holding valve check valve and into the boom cylinder
bottom side and the boom-up operation is carried out.
The boom cylinder rod side return oil goes through the boom (1) spool and returns to the hydraulic tank.
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Hydraulic systems - Hydraulic systems
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Hydraulic systems - Hydraulic systems
SMIL15CEX4325JB 4
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Hydraulic systems - Hydraulic systems
Pressure line Pilot tank line
Tank line Electric line
Pilot pressure line
1. 3-direction valve 13. Neutral cut valve
2. Shut-off valve 14. P1 pressure sensor
3. Crusher 15. Lever lock
4. Option switchover solenoid valve 16. 4 stack solenoid valve
5. Solenoid valve for 2 pumps flow 17. Console lever lock switch
6. Proportional switch 18. Hydraulic pump
7. Option pilot pressure sensor 19. P1 flow control proportional valve
8. Monitor display 20. Oil cooler
9. Main computer 21. Check valve
10. ATT select switch 22. 2 stack reducing valve
11. Port relief valve
12. Control valve
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Hydraulic systems - Hydraulic systems
NEGATIVE CONTROL PRESSURE MEASUREMENT
Pressure gauge installation
Disconnect the connector (3) from the N1 pressure sen-
sor (1) or N2 pressure sensor (2) of the pump, and re-
move the pressure sensor. ( N1, N2 : Pressure port)
(The pressure sensor location is used as the measur-
ing port.)
SMIL14CEX2096BB 30
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Hydraulic systems - Reservoir, cooler, and filters
16. Attach the 2 eyebolts M12 (1) on top of the hydraulic
tank, and then lift the hydraulic tank (4) with shackles
(2), wire ropes (3), and a liftcrane.
• While lifting it, be careful not to let the level gauge
(5) interfere with the frame beside the hydraulic
tank.
• The eyebolts should be tightened up and then loos-
ened a half turn.
SMIL15CEX4374BB 17
17. Make sure that the area is safe, and then place the
hydraulic tank on wood planks (1).
• Make sure to secure the hydraulic reservoir so as
to prevent it from falling.
SMIL15CEX4375BB 18
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Hydraulic systems - Variable displacement pump
5. Remove the SCR. Selective Catalytic Reduction
(SCR) muffler and catalyst - Prepare (10.500)
Remove the 4 bolts (1) with a wrench [ 19 mm] to re-
move the bracket (2).
SMIL15CEX5048AB 5
6. Remove the 9 bolts (1) with a wrench [ 19 mm] to re-
move the FW upper cover (2) the right house frame (3),
and the SCR bracket (4).
SMIL15CEX5049AB 6
7. Remove the 13 bolts (1) with a wrench [ 19 mm] to
remove the SCR bracket (2) the FW center cover (3),
and the FW rear cover (4).
SMIL15CEX5050BB 7
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Hydraulic systems - Pump control valves
SMIL14CEX6590H 4
Regulator operation explanation diagram: actuation by flow decrease/actuation by flow increase
*1 Left direction *3 Fulcrum A
*2 Right direction *4 Hydraulic circuit diagram
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Hydraulic systems - Main control valve
Main plunger
LPIL12CX01791GB 7
1. Plunger (Quantity 1) 6. O-ring (Quantity 1)
2. Spring guide (Quantity 2) 7. Spacer (Quantity 1)
3. Spring (Quantity 1) 8. Spring (Quantity 1)
4. Plunger cap (Quantity 1) 9. Check valve (Quantity 1)
5. Cap (Quantity 1)
a. BKT Plunger b. BM-1 Plunger
NOTE: 1.BM-1, BKT plunger: There is a check valve incorporated at one end.
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Hydraulic systems - Main control valve
3. When the bottom side pressure is high [PB > PA]
The head-side pressurized oil operates on check valve D from the feed path, and check valve D closes. At the
same time, it also operates on piston A of the regeneration switchover section. When the pressure becomes equal
to or greater than the spring C set pressure, it pushes piston A, spool B moves to the right, the path (*2) degree
of opening increases, and the rod side return oil flows through path (*1) - path (*2) and into the tank path.
LPIL12CX01985GB 27
1. Load holding valve 5. Spool B
2. Feed path 6. Spring C