Komatsu HD785-5 User Manual

.
OPERATION
TROUBLESHOOTING
CHASSIS
( ): Always contact your Komatsu distributor when dealing with these items.
In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs.
Problem Main causes Remedy
Torque converter oil temperature
monitor lamp flashes
Leakage of oil or entry of air due
to damage or defective tightening
of oil pipe, pipe joint
Wear, scuffing of gear pump
Insufficient oil in transmission
case
Loose fan belt
Clogged oil cooler
Long distance traveled in torque
converter range
Disconnected,broken wiring to
sensor
(
Check, repair)
(
Check, repair)
Add oil to specified level. See
CHECK BEFORE STARTING.
Replace belt. See EVERY 500
HOURS SERVICE.
(
Clean or replace)
Drive in direct range
(
Repair, connect wiring)
Steering wheel is heavy
Lack of grease at link
Internal leakage inside steering
cylinder
Add grease
(
Replace cylinder seal)
Steering wheel pulls
Tire inflation pressure not
uniform on left and right
Dragging, pulling of front brake
Make tire inflation pressure
uniform. See CHECK BEFORE
STARTING.
Check wear of front brake pad.
For details, see EVERY 500
HOURS SERVICE.
Braking effect is poor when brake
pedal is depressed
Pad has reached wear limit
Rear disc has reached wear limit
Insufficient air pressure
Insufficient brake oil
Air in brake circuit
(
Replace pad)
(
Replace disc)
Charge to specified pressure
Add brake oil. See CHECK
BEFORE STARTING.
Bleed air. See WHEN
REQUIRED.
Brake pulls to one side
Dump body speed is slow
Defective gear pump
Insufficient oil
(
Replace gear pump)
Add oil to specified level. See
CHECK BEFORE STARTING.
Suspension is hard
Entry of soil or sand due to
breakage of dust seal, gas
leakage due to breakage of
U-packing
Gas leaking from valve core
(
Replace U-packing)
(
Replace valve core)
Rear wheel on one side tends to
slip
Air in rear brake circuit (between
slack adjuster and rear brake)
Excessive difference in wear
between left and right tires
Excessive difference in division
of load between left and right
wheels (unbalanced load)
Excessive deformation of disc
Bleed air from rear brakes (left,
right). See WHEN REQUIRED.
(
Replace tires)
Make load uniform
(
Disassemble and adjust brake)
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Komatsu HD785-5 Specifications

General

Brand	Komatsu
Model	HD785-5
Category	Trucks
Language	English