Komatsu 830E-AC Shop Manual page 77

c. Check all hydraulic components - pumps,
valves and cylinders for damage and corro-
sion. Secure all mountings and connections.
Control valves in the cab must be free mov-
ing with no binding.
d. Check exposed portions of all hydraulic cyl-
inder rams for rust, pitting and corrosion. If
plating is deteriorated, the cylinder should be
removed and overhauled or replaced; pitted
or scored plating will cause leakage at the
cylinder seals.
9. Check the front wheel hub, final drive and wheel
axle lubricant. If contamination is suspected, oil
should be drained completely and the compo-
nent serviced with clean prescribed lubricant. If
major contamination is present, disassembly
and overhaul will be in order.
10. Check the parking brake. Since it is spring-
applied, the brake pads may be stuck tightly to
the disc, it may be necessary to remove and
overhaul the parking brake assembly.
11. Lubricate all grease fittings with prescribed
lubricants which are not part of the automatic
lubrication system. All pivot points must be free
of any binding.
12. Check the alternator for corrosion or deteriora-
tion. The alternator rotor must be free, with no
binding or roughness. Inspect, install and prop-
erly tension the alternator drive belts.
13. Check secureness of steering cylinder ball
joints, link, and hydraulic connections.
14. Examine Hydrair suspensions for signs of dam-
age.
a. Discharge nitrogen from suspensions as out-
lined in Section H. Check the condition of the
suspension oil and cylinder wipers. If wipers
are cracked or hardened, the suspension
must be rebuilt. Recharge the suspension
with new oil if old oil is deteriorated.
b. Check exposed chrome portions of the cylin-
der for rust, pitting and corrosion. If plating is
deteriorated the suspension should be
removed and overhauled or replaced; pitted
or scored plating will rapidly cause leakage
at the seals.
c. Recharge suspensions as outlined in the
service manual.
15. If not previously done, install fully charged bat-
teries and completely charge air tank (if
equipped) with shop air.
A07006
ENGINE OPERATION
Insure that all tools and loose equipment have
been removed prior to engine start-up. Sound
horn prior to engine start. Make sure emergency
shut down is reset. Cables must be free moving
in their housings.
When all reconditioning operations have been com-
pleted, a static check of engine operation along with
operation of systems as well as verification of braking
and steering must be done before the vehicle is
moved.
1. Insure all personnel are clear of equipment
before starting engine. Always sound the horn
as a warning before actuating any operational
controls.
Before starting engine, clear the immediate area
of personnel and obstructions.
Never start the engine in a building unless the
doors and windows are open and ventilation is
adequate.
2. Turn key switch ON. Warning lights for low
brake, and steering pressure should illuminate
and the horn should sound. If the horn does not
sound, check all components in the circuit and
correct the discrepancy before continuing.
3. Start the engine, and watch the engine oil pres-
sure gauge; if pressure does not show on the
gauge within 10 - 15 seconds, shut down the
engine and locate the problem.
Storage Procedures A7-9