Page 798 of 1395
Description
Hydraulic Flow (cont'dl
Reverse Driving at Constant Speed l2WD)when driving in reverse at a constant speed, the dual pump system functions in two wheel drive mode.The rotation speed of the front and rear wheels is the same, so the speed of the front and rear pumps is also the same,Fluid discharged by the front oil pump is drawn in by the rear oil pump and is circulated through the system. But, becausethe there is a difference in the capacity between the two pumps, fluid flows through check valve E, and then through ori-Iices. This fluid lubricates and cools the clutch assembly and bearings.ls this condition, only a low pressure is built up at the clutch piston. Therefore the clutch does not engage, and the vehicleremains in 2WD (front wheel drive).
Reverse Deceleration l/tWDl
During reverse deceleration, the dual pump system can engage four wheel drive.When decelerating in reverse direction, the speed of the rear wheels may exceed the speed of the front wheels (due toengine braking). In this condition, the rear oil pump draws fluid through check valves B and C. Fluid discharged from therear oil pump then flows through check valve E to the clutch piston. There, pressure is regulated by two orifices.The regulated hydraulic pressure at the clutch piston may force the plates and discs of the clutch together to form a con,nection. The engaged clutch passes driving force from the transfer assembly to the rear wheels, producing 4WD.
oRtFtcEsREAR OIL PUMP
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Page 803 of 1395
Rear Differential AssemblY
Troubleshooting
Most problems in the unit are to be diagnosed by identifying noises from the gears or bear'ngs'
care should be taken during diagnosis not to confuse differential noises with those from other drivetra'n components'
SymptomProbable CauseRemedy
Will not go into 4WD mode. Fluid level too low
. Incorrect fluid type
. Add fluid. Replace
Will not return to 2WD modeIncorrect fluid typeDrain and fill the differential
Gear or bearing noisesFluid level too low
Incorrect fluid type
Damaged or chipped gears
Add fluid
Drain and fill the differential
Replace the differential carrier
assemory
Overheating. Fluid leveltoo low
. Incorrect fluid type
. Add fluid. Drain and fill the differential
Fluid leakFluid level too high
Clogged breather hose
Worn or damaged oil seal
Damaged sealing washer
Loose mounting bolts or inade-
quate sealing
Lower to proper level
Clean or replace
Replace
Replace
Recheck torque or aPPIY sealant
15-13
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Page 804 of 1395
Maintenance
Differential Fluid
!@ Make sure lifts are placed properly lseesection 1).
1. With the vehicle on level ground, inspect differential
fluid with engine OFF.
2. Remove the oil filler plug, then check the level andcondition of the fluid.
Proper Level
o|I FII.IIR PI-UG4t N.m la.8 kgl.m, 35 lbl.ftl
The fluid level must be up ro the fill hole. lf it isbelow the hole, add the recommended fluid until itruns out, then reinstall the oil filler plug with a new
wasner.
lf the differential tluid is dirty, remove the drainplug, and drain the fluid.
4.
DMIN PLUGa7 N.m 14.8 kgl.m, 35 lbt.ftl
15-14
Clean the drain plug, then reinstall it with a new
washer, and refill the differential with the recom-
mended fluid to the proper level.
NOTEr lf you disassembly the differential, check thefluid level again after the 4WD system check is fin-
ished. Add fluid if necessary.
Reinstall the oil filler plug with a new washer.
Fluid Capacity
1.0 / {1.1 US $, 0.9 lmp qt) at tluid change
1.2 / {1.3 US $, 1.1 lmp qt) at oyerhaul
Recommended fluid:
Genuine Honda CVT Fluid
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Page 833 of 1395
Front DriveshaftsIntermediate Shaft
Installation {cont'd}
Install the damper fork over the driveshaft and ontothe lower arm. Install the damper in the damperfork so the aligning tab is aligned with the slot inthe damper fork.
FLANGE BOLT10 x 1.25 mm€ N.m {4.i1kst.n,32 lbf.ftl ALtcNtNG TAB
12x 1.25 mm64 N.m {6.5 kgf.m, 47 lbf.ftlReplace.
7. Loosely install the flange bolts and the new self-locking nut.
8. Apply oil to the seating surface of the new spindle nut.
FRONT WHEELi WHEEL NUT 12 x 1.5 mm108 N.m (11.0 kgf.m,80lbf.ftl
SPINDLE NUT24 x 1.5 mm245 N.m{25.0 ksf.m, 181 lbf.ft)NOTE: Atter tightening. use a drift tostake the spindle nut shoulder against the driveshaft.
9. Install a new spindle nut, then tighten the nut.10. Clean the mating surfaces of the brake disc and thewheel. then install the front wheel with the wheelnuts,
1'1. Tighten the flange bolts and the new setf-lockingnut with the vehicle's weight on the damper.12. Refill the transmission with recommended fluid (see
section 13 or 14).
13. Check the front wheel alignment. and adjust if nec-essary (see section 18).
16-18
1.
Removal
Drain the transmission oil or fluid (see section 13 or14).
Remove the left driveshaft (see page 16-3).
Remove the three dowel bolts.
Remove the intermediate shaft from the differential.Hold the intermediate shaft horizontal until it is clear ofthe differentialto prevent damage to the differential oilseal.
INTERMEDIATE SHAFT
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Page 852 of 1395
Uneven or rough steering.Ad,ust the rack gu ide (see page 17- 15).
ll the problem is not corrected byadjusting the rack guide, replacethe gearbox.
Adjust the belttension. Replace thebelt, if necessary (see page 17-14).Belt slipping on pulley.
lf the engine stalls when thewheel is turned while the vehicleis stopped or moving at lowspeed, adjust the idle speed (seesection 111.
ldle speed low or erratic.
Check power steering lluid level. lfthe level is excessively low checkfor leaks in the system. Add fluidto the specified level.
Air in reservoir, or check powersteering tluid level.
lf fluid level is OK, check O-ringsand seals on both ends of thepump inlet hose, and the P/Spump housing mating surlacesand drive shaft oil seal for suction leaks. Check the reservoir forcracks, Replace parts as neces-
Pump belt slipping on pulley(pump stops momentarily).Adjust the belt tension (see page17-14) or replace belt.
Check if pump pressure is normaland the gauge needle travel is 500kPa (5 kgl/cm,, 71 psi) or less.Check the flow control valve if theneedle travel exceeds 500 kPa (5kgflcm' , 71 psi). lI the flow controlvalve is normal, replace the pumpas an assembly,
Install the power steering pres-sure gauge, Close the pressurecontrol valve and shut off valve (if
so equipped) fully and measurethe pump pressure (see page 17-16ot 17 17).
Steering wheel kicks backduring wide turns.
7-7
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Page 854 of 1395
Pump noiseGrating nois€trom pump
Pump noise
Raftle or chattering
Check the fluid lev€1.lt low, fill the reservoir to theproper level. and check for leaks.Tighten or roplace as necessary,
Cavitation caused by air bubblesin the fluid.
Check for a crushed inlet hose ora loose hose clamp allowing airinto the suction side of the system. Check the reservoir forcracks. Tighten or replace as nec-
Check the drive shaft oil seal.
Pump noise up to 2 - 3 minutesafter starting in cold weather isnormal, Compare pump noise atoperatrng temperature to anothervehicle.
ll pump noise is abnormally loud,remove and inspect the pump forwear and damage (see page 17-251.
Tighten or replace the pulley.lI shaft is loose, replace thepump.
17-9
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Page 855 of 1395
Troubleshooting
Fluid Leaks
Check the gearbox assembly for oil leaks carefully. Oil can leak out ot various points, depending on location of the faulty
oil seals/seal rings. Check the following before removing the gearbox from the frame.
Steering GearboxLeaking from the oil seal on thetop of the valve housing.Replace the valve oil seal fromthe valve housing.
Leaking from cylinder end intoleft tie rod boot.Replace the valve oil seal fromthe pinion shaft.
Replace the cylinder end seal onthe valve body unit side.
Leaking from cylinder end intoright tie-rod boot.Replace the cylinder end seal onthe cylinder end side.
Leaking lrom the shaft upper endsection or pin engagement sec-tion of the pinion shaft.Replace the valve body unit.
Tighten the connector. It it's stillleaking, replace the line, cylinderor valve housing.
Leaking from cylinder line A or Bconnections (at tlare nut).
Leaking caused by a damagedcylinder line A or B.Replace cylinder line A or B.
Leaking from pump outlet hoseand return line joint fitting on thevalve body unit {at tlare nut}.
Tighten the connector. ll it's stillleaking, replace the line, joint fit-ting or valve housing,
17-10
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Page 888 of 1395
20. Press the new bearing into the valve housing with
the stamped letter facing up using a hydraulic press
and soecialtool.
ATTACHMENT,32x35mm07746 - 0010100
- ROLLER BEARINGLetter stamped face
21. Apply vinyl tape to the pinion shaft, then coat the
vinyltape with power steering fluid.
Sealing lip tace.VALVE OIL SEAL
VALVE HOUSING
SHAFT
SLEEVE SEAL
PINION
E
22, Insert the pinion shaft into the valve housing. Be
careful not to damage the valve seal rings.
23. Remove the vinyl tape from the pinion shaft, then
remove any residue from the tape adhesive.
8e sure that theseal rings are notturned up, theninstall.
DRIVER
24. Press the pinion shaft/sleeve using a hydraulic
press. Check that the pinion shaft/sleeve turns
smoothly by turning the pinion shaft,
(cont'd)
17-43
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