Chevrolet 2005 T-Series Owner's Manual page 257

(23) = Drain, flush and refill cooling system.
See Part C: Recommended Fluids and Lubricants on
page 6-28 for what to use. Inspect hoses. Clean
radiator, condenser, pressure cap and neck. Pressure
test cooling system and pressure cap.
(24) = Rear axle service: Change the lubricant. See
Part C: Recommended Fluids and Lubricants on
page 6-28.
(25) = Front axle service: Re-pack upper kingpin
roller bearing.
(26) = Air brake service:
•
Inspect brake lines and hoses for proper hook-up,
binding, leaks, cracks, chafing, etc. Inspect drum
brake linings for wear or cracks. Inspect other brake
parts at each wheel, including drums, wheel
cylinders and piston heat shields, boots and wheel
speed sensor wiring. Check brake pedal for
excessive free play or travel (or every 6 months,
whichever occurs first) and have serviced if needed.
Check brakes more often if driving habits and
conditions result in frequent braking. Replace air
dryer cartridge only if excessive oil or moisture
is present. A small amount of oil in the system is
normal and should not be considered as a reason to
replace the cartridge.
•
Test air lines for leaks; tighten as needed. Replace
compressor filter.
•
Inspect air parking brake chamber for leaks and
damage. Inspect lines and hoses for leaks,
cracks, chafing, etc. Also check all attachments for
tightness, wear or damage. Note: The spring
brake section of the rear brake diaphragms are
non-serviceable.
•
Replace the air compressor filter element, mounted
on the air compressor. For remote air compressor
intake service, refer to engine air cleaner filter
replacement.
•
Remove, disassemble, clean and inspect the safety
valve, standard brake chamber, quick release valve,
quick release/double check valve combination,
parking brake control valve, double check valve,
pressure protection valve and alcohol injector.
•
Remove, disassemble and clean the application
valve; replace parts showing wear.
•
Remove, disassemble, clean and inspect the spring
brake control valve; replace rubber parts.
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