GMC 1986 P-Truck Service Manual page 54

G SERIES HEATER— ON-VEHICLE SERVICE
113
114
BLOWER MOTOR REPLACEMENT
Remove or Disconnect (Figure 14)
Battery ground cable.
1.
2. Coolant overflow hose from the recovery bottle.
3. Fasteners.
4. Bottle from the vehicle.
5. Blower motor lead wire.
6. Motor and wheel assembly (113).
• Five mounting screws.
• Gently pry on the blower flange if the sealer
acts like an adhesive.
7. Blower sheel shaft nut (112).
8. Blower wheel from the motor (111).
Install o r Connect
1. Blower wheel to the motor shaft.
• Locate the open end of the wheel away from
the blower motor.
2. Blower wheel shaft nut.
3. Motor and wheel assembly.
4. Bead of sealer to the mounting flange.
Figure 14—G-Model Component View
5. Blower motor lead wire.
6. Coolant bottle to the vehicle.
7. Fasteners.
8. Coolant hose.
9. Battery ground cable.
10. Test the blower.
Heater hoses are routed from the therm ostat
housing or inlet manifold and water pump (radiator on
some automatic transmission vehicles) to the core inlet
and outlet pipes (figure 15). Hoses are attached at
each end with screw-type clamps.
REPLACEMENT
When replacing heater hoses, maintain a 13 mm (V
inch) minimum clearance between the hose clip and
the upper control arm, a 38 mm (
clearance between the hoses and the propshaft, and a
32 mm (11 /4-inch) minimum clearance between the
auxiliary heater core lines and the exhaust pipe. Refer
to figure 15.
HEATING 1A-15
121. Housing
110. Nut
122. Core
111. Fan Assem bly
112. Washer 123. Strap
124. Case
113. M otor
114. Tube 125. Bracket
115. Fitting
126. Valve
116. Case 127. Shaft Assem bly
117. Gasket 128. Duct
118. Pin
119. Valve
120. Shaft
HEATER HOSES—ROUTING
B-09761
-
2
1 / -inch) minimum
1 2