Caterpillar 793c Service Repair Manual
Description
Caterpillar 793c Service Repair Manual
WALK AROUND INSPECTION
Before working on or operating the truck, read the Operation and
Maintenance Manual (Form SEBU6995) thoroughly for information on
safety, maintenance and operating techniques.
Safety precautions and Warnings are provided in the manual and on the
truck. Be sure to identify and understand all symbols before starting the
truck.
The first step to perform when approaching the truck is to make a
thorough walk around inspection. Look around and under the truck for
loose or missing bolts, trash build-up and for coolant, fuel or oil leaks.
Look for indications of cracks. Pay close attention to high stress areas as
shown in the Operation and Maintenance Manual.
The front wheel bearing oil level is checked and filled by removing the
plug (arrow) in the center of the wheel bearing cover. The oil should be
level with the bottom of the plug hole.
Check the tire inflation pressure. Operating the truck with the wrong tire
inflation pressure can cause heat build-up in the tire and accelerate tire
wear.
Inspect the condition of the front wheel bearing axle housing breather.
The breather prevents pressure from building up in the axle housing.
Pressure in the axle housing may cause brake cooling oil to leak through
the Duo-Cone seals in the wheel brake assemblies.
Caterpillar 793c Service Repair Manual
Two grease outlet fittings are located on the front of each suspension
cylinder. The grease supply line for the Auto Lubrication System is
located at the rear of the suspension cylinder. No grease outlet fittings
should be located on the same side of the suspension cylinder as the
grease fill location. Having an outlet fitting on the same side of the
suspension cylinder as the grease fill location will prevent proper
lubrication of the cylinder.
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