PDF Service Manual New Holland W170C Tier 4B Wheel Loader - 14 MB
This is the official service manual for the New Holland W170C Tier 4B Wheel Loader.
It contains comprehensive, step-by-step instructions for every repair and maintenance procedure you may need to perform.
The manual is filled with detailed diagrams, specifications, and troubleshooting guides.
It is an indispensable resource for professional technicians aiming to keep this machine in peak operating condition.
Trust this factory manual for accurate and reliable information.
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 ---
SERVICE SERVICE MANUAL
MANUAL
W170C Tier4B
Wheel Loader
W170C
Wheel Loader
1/2
Part number 47878248 Part number 47878248
English
July 2015
© 2015 CNH Industrial Italia S.p.A. All Rights Reserved.
--- Page 3 ---
INTRODUCTION
Consumables
Engine
Type of oil NEW HOLLAND AMBRA UNITEK 10W-40 API CJ-4
Capacity (with filter change) 13.25 L (14.0 US qt)
Total capacity in system 15.1 L (16.0 US qt)
Cooling system
Type of coolant NEW HOLLAND AMBRA ACTIFULL™ OT EXTENDED
LIFE COOLANT
System capacity 28.4 L (30.0 US qt)
Fuel system
System capacity 253 L (66.8 US gal)
Hydraulic system
Type of fluid NEW HOLLAND AMBRA HYDROSYSTEM 46 HV
Total system capacity 177.8 L (47.0 US gal)
Reservoir capacity 90.8 L (24.0 US gal)
Transmission
Type of oil NEW HOLLAND AMBRA MULTI G 134™ HYDRAULIC
TRANSMISSION OIL
Service capacity - with filter change 34.1 L (36.0 US qt)
Axles
Type of oil NEW HOLLAND AMBRA MULTI G 134™ HYDRAULIC
TRANSMISSION OIL
Standard front axle 35 L (37.0 US qt)
Standard rear axle 23 L (24.3 US qt)
Optional front axle 35 L (37.0 US qt)
Optional rear axle 35 L (37.0 US qt)
DEF/ADBLUE®
Total capacity (*) 37.1 L (39.2 US qt)
Grease fittings, as required NEW HOLLAND AMBRA GR 75 MD
NOTICE: (*) Some liters always remains in the DEF/ADBLUE® reservoir. This allows for correct functioning of the
wheel loader components. DO NOT overfill the DEF/ADBLUE® tank. The tank is full when the DEF/ADBLUE® fluid
level in the tank reaches the bottom of the fill neck. Adequate air volume must be present in the top of the tank for
proper functionality of the after treatment system.
47878248_EN 08/07/2015
19
--- Page 4 ---
Engine - Engine and crankcase
47. Remove the cooling fan screen.
LEIL13WHL0160AB 47
48. Loosen the clamp (1) on the intake manifold for the
output hose of the after cooler.
Loosen the clamp (2) from the body of the
DEF/ADBLUE® tank vent filter.
LEIL13WHL0613AA 48
49. Loosen the clamp on the after cooler, and remove the
output hose of the after cooler from the machine.
LEIL13WHL0162AB 49
50. Tag and disconnect the fuel filter heater wire (1) and
the water sensor (2). Then drain fuel filter and discon-
nect the inlet (3) and outlet (4) fuel lines from the fuel
filter head. Plug the lines and cap the fittings.
Remove the ground wire and the attachment bolt (5)
of the fuel filter head.
LEIL13WHL0163AB 50
47878248_EN 08/07/2015
10.1 [10.001] / 16
--- Page 5 ---
Engine - Engine and crankcase
47. Connect the wiring harness to the alternator.
RAPH12WEL0622AA 47
48. If the machine is equipped with the air conditioning
system, secure the compressor to the support bracket
with the mounting bolts (3). Then connect the engine
wiring harness to the high pressure switch (2) and to
the air compressor clutch connector (1).
LEIL13WHL0156AB 48
49. Install the drive belt.
LEIL13WHL0155AB 49
50. Secure the mounting bracket of the belt cover to the
machine frame. Then install the belt cover.
LEIL13WHL0154AB 50
47878248_EN 08/07/2015
10.1 [10.001] / 39
--- Page 6 ---
Engine - Selective Catalytic Reduction (SCR) exhaust treatment
SCR System Components
The main components of SCR system are:
DEF/ADBLUE® solution tank
• A catalyst solution, DEF/ADBLUE® is required for the system to operate. The vehicle typically consumes approxi-
mately 5 percent to 6 percent as much DEF/ADBLUE® as diesel fuel. This fluid consists of 32.5 percent urea mixed
into distilled water. Use of containers with traces of other liquids to handle DEF/ADBLUE® causes contamination
that fouls the system. Proper handling procedures are required. Use only American Petroleum Institute (API) cer-
tified DEF/ADBLUE®.
• Engine coolant circulates through the Tank Heater to thaw the DEF/ADBLUE®. An On-Off solenoid valve controls
the coolant flow to prevent DEF/ADBLUE® overheating.
• The primary DEF/ADBLUE® suction filter is installed at the bottom of the tank heater unit. This filter does not require
scheduled maintenance, but can be detached from the tank heater and cleaned or replaced if conditions require.
• A smaller, secondary inline DEF/ADBLUE® filter (if equipped) is installed between the tank and the inlet of the supply
module.
• The tank vent is equipped with a filter to protect the DEF/ADBLUE® system from airborne debris. This filter must
be replaced every 500 hours.
Supply Module
The Supply Module (1) contains a pump which withdraws
the DEF/ADBLUE® from the DEF/ADBLUE® tank (2). The
DEF/ADBLUE® is then directed to the dosing module con-
nected to the Diesel Oxidation Catalyst (DOC).
LEIL13WHL0250AB 2
47878248_EN 08/07/2015
10.3 [10.500] / 6
--- Page 7 ---
Engine - Selective Catalytic Reduction (SCR) exhaust treatment
Coolant control valve - Remove
CAUTION
Flying debris!
Compressed air can propel dirt, rust, etc. into the air. Wear eye and face protection when using com-
pressed air.
Failure to comply could result in minor or moderate injury.
C0049A
1. Raise the hood using controls located behind the ac-
cess cover.
LEIL13WHL1433AA 1
2. Turn the master electric switch to the “off” position.
RCPH11WHL653BAU 2
3. Place a suitable container below the radiator drain lo-
cated behind the access cover. Remove the radiator
cap.
Remove the drain cap and drain the engine coolant.
Install the tank drain plug and the radiator cap after
coolant has drained.
NOTE: Use compressed air and water to clean debris from
around drain plug area prior to draining the system.
RCPH11WHL712BAU 3
47878248_EN 08/07/2015
10.3 [10.500] / 29
--- Page 8 ---
Engine - Engine cooling system
18. Install the radiator cap
NOTE: Machine pictured includes the heavy duty/high de-
bris cooling option. Your machine may differ slightly in ap-
pearance.
RAIL12WEL0103AA 18
19. Fill the coolant tank up to the FULL mark on the reser-
voir.
RAIL12WEL0105AA 19
20. Put the electrical master switch in the “ON” position.
RCPH11WHL653BAU 20
21. Start the engine and run the engine at low idle.
Run the engine at operating temperature for ap-
proximately five minutes to completely mix the NEW
HOLLAND AMBRA ACTIFULL™ OT EXTENDED
LIFE COOLANT. When the coolant is at operating
temperature, stop the engine. When engine has
cooled, check the coolant level at the tank.
47878248_EN 08/07/2015
10.4 [10.400] / 16
--- Page 9 ---
Engine - 10
Aftercooler - 310
W170C XR
W170C ZBAR
47878248_EN 08/07/2015
10.6 [10.310] / 1
--- Page 10 ---
Engine - Aftercooler
11. Lower hood.
RCPH11WHL653BAU 11
12. Close screen and T-handle secure in place (if avail-
able). Put transmission in park and turn off.
RAPH12WEL0190AA 12
47878248_EN 08/07/2015
10.6 [10.310] / 24
--- Page 11 ---
Transmission - Powershift transmission
RCPH11WHL040HAN 3
Schematic
47878248_EN 08/07/2015
21.1 [21.113] / 11
--- Page 12 ---
Transmission - Powershift transmission
25. Remove shaft seal (1) from the pump housing (2).
RAPH11WEL0323AA 23
Converter back-pressure valve
26. With a screwdriver, release the converter back-pres-
sure safety valve (1) and remove the locking plate (2).
RAPH11WEL0324BA 24
27. Remove the individual parts of the converter safety
valve.
Legend
1. pressure plate
2. compression spring
3. piston
RAPH11WEL0325AA 25
47878248_EN 08/07/2015
21.1 [21.113] / 34
--- Page 13 ---
Transmission - Powershift transmission
Reassembly: Engine connection, oil pressure pump, converter back-pressure valve and
temperature sensor
Converter back-pressure valve
43. Install pressure plate (4), with the pin 6 mm (0.236 in)
facing towards the locking plate (1).
Converter back-pressure valve
1. Oil feed housing
2. Piston
3. Compression spring
4. Pressure plate
5. Locking plate
RCPH11WHL228BBU 37
44. Assemble single parts, preload them with an assem-
bly tool or screwdriver (1) and secure them with the
locking plate (2).
RCPH11WHL229BBU 38
45. Mount temperature sensor with new O-ring. Torque to
25 N·m (18 lb ft).
NOTE: version without temperature sensor: Secure screw
plug with new O-ring and torque to 25 N·m (18 lb ft).
RAPH11WEL0402AA 39
47878248_EN 08/07/2015
21.1 [21.113] / 57
--- Page 14 ---
Transmission - Powershift transmission
31. Remove temperature sensor.
RAPH11WEL0326AA 28
32. Remove stator shaft (1). If applicable, remove the
pressure relief valve (2) out of the housing hole.
NOTE: the pressure relief valve is not mounted on all ver-
sions.
RAPH11WEL0327AA 29
Version without emergency steering pump
33. Remove the hexagon bolts (1), the cover (2) and the
seals.
RAPH11WEL0419AA 30
47878248_EN 08/07/2015
21.1 [21.113] / 80
--- Page 15 ---
Transmission - Powershift transmission
Oil pressure pump
46. Insert pressure relief valve (1) into the housing hole
until contact is made.
47. Mount two adjusting screws (4) and insert gasket (3)
and oil feed housing (2).
NOTE: use assembly grease.
NOTE: adjusting screws are dealer fabricated.
NOTE: the pressure relief valve is not mounted on all ver-
sions.
RAPH11WEL0403AA 40
48. Install two adjusting screws (4) and mount stator shaft
(1).
NOTE: adjusting screws are dealer fabricated.
NOTE: pay attention to radial installation position.
RAPH11WEL0404AA 41
49. Install outer rotor with chamfer (see arrow) facing
downward.
NOTE: in case of wear marks in the pump housing or on
the control disc, the pump assembly must be replaced.
RAPH11WEL0405AA 42
47878248_EN 08/07/2015
21.1 [21.113] / 103
--- Page 16 ---
Transmission - Powershift transmission external controls
12. Remove retaining clamp.
RCPH11WHL203BBU 12
13. Remove Torx bolts (1) and cover (2). Repeat the pro-
cedure on the opposite end cover (3).
RCPH11WHL203BBU 13
14. Remove wiring harness (1). Remove cylindrical bolts
(3), securing plates and pressure controllers (2).
RCPH11WHL758BAU 14
47878248_EN 08/07/2015
21.2 [21.135] / 8
--- Page 17 ---
Transmission - Powershift transmission external controls
16. Remove Torx bolts (1) and cover (2). Repeat the pro-
cedure on the opposite end cover (3).
RCPH11WHL203BBU 15
17. Remove wiring harness (1). Remove cylindrical bolts
(3), securing plates and pressure controllers (2).
RCPH11WHL758BAU 16
WK - solenoid valve (5 - speed)
18. Mark installation position of connecting housing (4)
towards valve block (5).
19. Remove cylinder bolts (1) and lock-up clutch valve.
20. Remove bolt neck (2) and discard O-rings.
21. Remove Torx bolts (3), and the connecting housing.
RAPH11WEL0226AA 17
47878248_EN 08/07/2015
21.2 [21.135] / 31
--- Page 18 ---
Transmission - Powershift transmission internal components
3. Use Up and Down keys to highlight Calibration icon
from Service menu. Use the Enter / Confirm key to
choose selection.
RCPH11WHL022BAN 3
NOTE: ensure oil is warm to temperature of 90 °C (194 °F). Use transmission stall test procedure to achieve required
temperature.
4. Park machine on firm, level surface.
5. Place the transmission control lever in NEUTRAL.
6. Set the parking brake.
7. Use Up and Down keys to highlight ClutchCalib icon
from Calibration menu. Use the Enter / Confirm key to
choose selection.
If machine conditions are not correct, an error message
will appear. The calibration procedure will not complete.
Follow the prompt to aid in correcting any machine condi-
tions.
The screen may display the following prompts to guide the
user to correct machine conditions:
• Not in neutral Action required – Shift into neutral
• Parking brake OFF Action required – Turn the Parking
Brake ON
• Machine moving Action required – Stop the machine
4
• Oil temp too low Action required – Stall the transmission RCPH11WHL021BAN
to heat the oil to 90 °C (194 °F)
• Oil temp too high Action required – Run at high idle with
no load to cool the oil
• Engine RPM low Action required – Operate the engine
at full RPM
• Engine RPM high Action required – Operate the engine
at idle speed
47878248_EN 08/07/2015
21.3 [21.155] / 4
--- Page 19 ---
Transmission - Powershift transmission internal components
Clutch - Assemble - Reverse clutch KR - 4 and 5 Speed - W170C
CAUTION
Burn hazard!
Always wear heat-resistant protective gloves when handling heated parts.
Failure to comply could result in minor or moderate injury.
C0047A
CAUTION
Eye injury hazard!
Wear protective goggles when using compressed air.
Failure to comply could result in minor or moderate injury.
C0035A
1. Heat bearing to approximately 120 °C (248 °F).
RCPH11WHL131BBU 1
2. Mount bearing (1) until contact is made. Adjust bearing
after it cools. Fit rectangular ring (2).
NOTE: always wear protective gloves to prevent burning
your hands when handling heated parts.
RAPH11WEL0125AA 2
47878248_EN 08/07/2015
21.3 [21.155] / 27
--- Page 20 ---
Transmission - Powershift transmission internal components
Clutch - Disassemble - Second gear clutch K2 - 4 and 5 Speed -
W170C
CAUTION
Eye injury hazard!
Wear protective goggles when using compressed air.
Failure to comply could result in minor or moderate injury.
C0035A
RAPH11WEL0063AA 1
Clutches K1, K2, K3, K4, KR, KV and Input
1 K1 clutch
2 K2 clutch
3 K3 clutch
4 K4 clutch
5 KR clutch
6 KV clutch
7 Input
47878248_EN 08/07/2015
21.3 [21.155] / 50
--- Page 21 ---
Transmission - Powershift transmission internal components
10. Install outer and inner discs into the disc carrier (4).
Legend
• (1) Friction disc – coated on one side (1 pc)
• (2) Outer discs – (7 pcs)
• (3) Inner discs – (7 pcs)
NOTE: make sure that the uncoated (blank) side of the
friction disc (1) is showing towards the piston. Number of
friction surfaces is 12.
RCPH11WHL269BBU 9
11. Mount end plate (1) and secure disc package using
snap ring (2) (e.g. thickness = 2.65 mm (0.104 in.)
recommended value).
RCPH11WHL135BBU 10
12. Press on end plate with a force of approximately 100 N
= 10 kg (22.5 lb) and set dial indicator to "zero“.
RCPH11WHL136BBU 11
47878248_EN 08/07/2015
21.3 [21.155] / 73
--- Page 22 ---
Transmission - Powershift transmission internal components
6. Mount bearing until contact is made. Adjust bearing
after it cools.
NOTE: always wear protective gloves to prevent burning
your hands when handling heated parts.
RAPH11WEL0172AA 6
7. Install snap ring (1) into the annular groove of the tur-
bine shaft (2).
RCPH11WHL080BBU 7
8. Mount turbine shaft (1) until the snap ring engages into
the input shaft groove. Snap in and interlock rectangu-
lar ring (2).
NOTE: turbine shaft is axially secured.
RAPH11WEL0173AA 8
47878248_EN 08/07/2015
21.3 [21.155] / 96
--- Page 23 ---
Four-Wheel Drive (4WD) system - Drive shaft
Drive shaft - Install - Center Drive Shaft
1. Hold the center drive shaft in position and install the
bolts and straps that fasten the center drive shaft to the
transmission. Tighten the bolts to 75 - 81 N·m (55 -
60 lb ft)
LEIL13WHL1070AB 1
2. Install the bolts and straps that fasten the center drive
shaft to the yoke of the front drive shaft. Tighten the
bolts to 75 - 81 N·m (55 - 60 lb ft)
LEIL13WHL1069AB 2
47878248_EN 08/07/2015
23.1 [23.314] / 7
--- Page 24 ---
Front axle system - Powered front axle
Powered front axle - Install
1. Carefully move front axle under machine and raise
against mounting pads on machine.
2. Apply one drop of engine oil to threads prior to assem-
bly. Install four washers on the top side (2), four bolts
(1), four washers on the bottom side, and four nuts (3)
on each side of the axle to secure front axle to machine.
BD01F296-01 1
3. Tighten bolts to a torque of 783 - 857 N·m (578 - 632 lb
ft) in the sequence indicated.
A. Front side of machine
LEIL14WHL0416BB 2
47878248_EN 08/07/2015
25.1 [25.100] / 8
--- Page 25 ---
Front axle system - Front bevel gear set and differential
13. Remove piston (arrow) from axle housing.
NOTE: step is necessary only for DHL version.
RAIL11WEL0234BA 13
14. Use compressed air to remove piston.
NOTE: step is necessary only for DHL version.
RAIL11WEL0235BA 14
15. Heat slotted nut with a hot air blower.
NOTE: slotted nut is secured with LOCTITE® 262™.
RAIL11WEL0236BA 15
47878248_EN 08/07/2015
25.2 [25.102] / 17
--- Page 26 ---
Front axle system - Front bevel gear set and differential
13. Preload disk package with an axial force of F = 50 +30
KN. Then check setting dimension “A” = 1.05 +/-0.1
mm (0.041 +/-0.004 in) from collar of differential cover
to plane face of outer disc (also see sketch in step 14).
NOTE: any deviation from specified setting dimension
must be corrected with a corresponding outer disk.
NOTE: special tools pressure piece and load cell are to be
determined. Contact special tools.
RAIL11WEL0282BA 13
14. A = Setting dimension = 1.05 +/- 0.1 mm (0.041
+/-0.004 in); B = Contact face.
NOTE: to obtain correct measuring result, housing cover
may only be supported on contact face (B). Ensure that
assembly stand is only supported on disk package and not
on disk carrier.
RAIL11WEL0283BA 14
15. Position housing cover onto pressure piece (arrow).
Insert two hex bolts into housing cover to radially at-
tach disc package.
RAIL11WEL0284BA 15
47878248_EN 08/07/2015
25.2 [25.102] / 40
--- Page 27 ---
Front axle system - Final drive hub, steering knuckles, and shafts
10. Insert back-up rings and grooved rings into annular
grooves of brake housing (arrows).
RAIL11WEL0432BA 10
11. Clean annular groove of brake housing with mineral
spirits. Insert guide ring into annular grove (go to step
12). Secure it with Loctite (type no. 415) at its ends
(arrows).
NOTE: full circumference of guide ring must be in an exact
contact position.
NOTE: upon installation, orifice of guide ring must show
upwards - 12 o’clock position.
RAIL11WEL0433BA 11
12. Upon installation, orifice of guide ring must show up-
wards - 12 o’clock position.
1. Brake housing
2. Guide ring
3. Back-up ring
4. Grooved ring
5. Grooved ring
6. Back-up ring
7. Slide ring seal
8. Output shaft
RAIL11WEL0434BA 12
47878248_EN 08/07/2015
25.3 [25.108] / 19
--- Page 28 ---
Rear axle system - Powered rear axle
12. Bleed the brakes.
13. Put articulation lock in OPERATING position.
47878248_EN 08/07/2015
27.1 [27.100] / 12
--- Page 29 ---
Rear axle system - Rear bevel gear set and differential
12. Press bearing bushing from axle housing hole. If
needed, make a slot (bold line) in the bearing bush-
ing.
RAIL11WEL0590BA 12
NOTE: bearing bushing will be destroyed and should be replaced.
13. Attach a suitable lifting device to the differential and
lift differential out of the axle drive housing.
RAIL11WEL0028BA 13
14. Pull the bearing outer ring from the housing hole and
remove the shim behind it.
RAIL11WEL0029BA 14
47878248_EN 08/07/2015
27.2 [27.106] / 21
--- Page 30 ---
Rear axle system - Rear bevel gear set and differential
7. Mount second axle bevel gear.
RAIL11WEL0276BA 7
8. Secure thrust washers into housing cover with grease.
RAIL11WEL0277BA 8
9. Mount two adjusting bolts and insert housing cover un-
til contact with differential housing is obtained. Preload
differential using a press. Secure with new locking
bolts. Torque to 400 N·m (295 lb ft).
RAIL11WEL0278BA 9
47878248_EN 08/07/2015
27.2 [27.106] / 44
--- Page 31 ---
Rear axle system - Planetary and final drives
Wheel hub - Visual inspection - Models MT-L 3065 II / MT-L 3075 II
NOTICE: do not use compressed air to dry bearings. Allow bearings to air dry.
1. Clean all parts except friction plates in brake disc pack
using cleaning solvent. WEAR FACE PROTECTION
WHEN USING COMPRESSED AIR. Use compressed
air to clear passages in planetary ring gear and brake
housing.
2. Inspect bearing rollers for pitting, scoring, deforma-
tion, or other damage. Check inner face and bear-
ing cage for deformation, dents, and other damage.
Check associated bearing cups for scratches, grooves,
or cracks. Check bearings for rough spots or binding
by holding bearing and rotating. If bearing binds or ac-
tion is not smooth, replace the bearing.
3. Inspect bearing cups for pitting, scoring, cracks, or
other damage. Replace if any of these conditions are
seen.
NOTE: If a bearing or bearing cup requires replacement,
the associated part must also be replaced.
4. Check planetary ring gear, planetary gears, and plan-
etary carrier gear teeth for cracks, breaks, chipping, or
other damage. Replace the part if any of these condi-
tions are seen. Check planetary carrier shaft splines for
broken, cracked, or twisted condition. Replace if nec-
essary.
5. Check wheel end shaft for cracked, broken, or twisted
splines. Replace if any of these conditions are seen.
47878248_EN 08/07/2015
27.3 [27.120] / 13
--- Page 32 ---
Rear axle system - Planetary and final drives
4. Then mount new slide ring seal (part 2) into brake hous-
ing.
NOTE: step shows version with slide ring seal.
ATTENTION: risk of injury - metal rings have extremely
sharp edges. Wear protective gloves.
NOTE: surface of slide ring seal may not have any grooves,
scratches or other damage. Make sure sealing surface is
parallel to housing face. O-rings must be mounted evenly
into locating hole and must not bulge out.
RAIL11WEL0426BA 4
5. Insert both bearing outer rings (arrows) into brake
housing until contact is made.
RAIL11WEL0427BA 5
6. Refer to illustration to see installation position of the
combi seal.
1. Output shaft
2. Brake housing
3. Combi seal consisting of: a = Shaft seal, b =
Screening plate.
NOTE: steps 6 to 8 are for the Version with combi seal
Illustration shows installation position of combi seal.
RAIL11WEL0428BA 6
47878248_EN 08/07/2015
27.3 [27.120] / 36
--- Page 33 ---
Brakes and controls - Hydraulic service brakes
Brake pedal control valve - Component identification
LEIL14WHL0485GB 1
1. BRAKE VALVE 6. PARKING BRAKE HOSE
2. BRAKE VALVE SUPPLY HOSE 7. RETURN BRAKE TO TANK HOSE
3. BRAKE FRONT ACCUMULATOR HOSE 8. PARKING BRAKE ACCUMULATOR HOSE
4. BRAKE REAR ACCUMULATOR HOSE 9. BRAKE VALVE DISCHARGE HOSE
5. REAR AXLE BRAKE HOSE 10. FRONT BRAKE HOSE
47878248_EN 08/07/2015
33.1 [33.202] / 11
--- Page 34 ---
Brakes and controls - Hydraulic service brakes
3. Make sure the service brake accumulators (1) and
the parking brake accumulator (2), are completely
discharged.
Make sure the service the brake damping accumula-
tors are completely discharged (only for the machines
equipped with the heavy duty axles).
Push down and release the brake pedal at least 30°.
4. Turn the master disconnect switch to the OFF position.
5. Remove the left cab skirt located under the cab or
canopy to gain access to accumulators.
6. To release the pressure on the parking brake accu-
mulator, the line at the accumulator must be SLOWLY
cracked open. A pan will be needed to catch the hy-
draulic oil.
7. Connect a drain hose to the quick disconnect couplings
in each brake circuit to release any pressure in the
brake circuit.
8. Clean the brake accumulators (1), and the parking
brake accumulator (2), and lines.
Clean the brake damping accumulators (only for the
machines equipped with the heavy duty axles).
9. Put identification tags on the line that is connected to
the parking brake accumulator (2).
10. Connect a vacuum pump to the hydraulic reservoir.
Start the vacuum pump.
11. Disconnect the tubes from both brake accumulators
(1).
12. Loosen the clamp stud (8) on the accumulator clamp
(7).
13. Remove the accumulators (1) from the accumulator
clamps (7).
14. Install plugs in the tubes.
15. Disconnect the hose from parking brake accumulator