W350 1 Ton Pickup 4WD V8-360 5.9L VIN 1 4-bbl (1988)
Air Injection Pump: Service and Repair
Single Air Pump
Air Pump Mounting
AIR PUMP
REPAIR
The air injection pump is a non-repairable unit, the only serviceable part is the centrifugal filter fan. Do not disassemble or attempt to rebuild the pump
for any reason. If the pump has been found to be faulty, replace the whole unit.
REMOVAL
1.
Remove air hose from switch/relief or diverter valve.
2.
Loosen air pump pivot and adjusting bolts, and remove air pump belt.
3.
Remove air pump bolts. Remove air pump and pulley, switch/relief or diverter valve, and brackets from vehicle.
4.
Remove switch/relief or diverter valve, brackets, and pulley from air pump. Remove the gasket and clean surfaces that will be used again.
INSTALLATION
1.
Install air pump pulley, diverter or switch/relief valve (use new gasket), and brackets on air pump. Refer to SPECIFICATIONS for torque
specifications.
2.
Position air pump on engine and install pump bolts and pump pivot bracket.
3.
Install air pump belt and adjust to specifications. Refer to ADJUSTMENT PROCEDURES for air pump belt tension specifications.
4.
Reconnect air hose to the switch/relief or diverter valve.
WARNING: Never pry on the air pump housing to tighten the drive belt.
