GMC 1976 ZEO 6083 Maintenance Manual page 803

3. Remove two motor nuts to separate motor.
4. Loosen screw to slide off small pulley from
motor shaft.
5. When reassembling, be sure to adjust belt ten-
sion before tightening motor nuts . Proper adjust-
ment is made when belt can be depressed 1/8 inch
at a point halfway between pulleys.
PRESSURE SWITCH (TYPE 1
WATER PUMP) (FIGURE 22)
The pressure switch, mounted on the type 1 wa-
ter pump, is non-adjustable . If the switch fails to
operate properly, replace it . The pump should oper-
ate between 15 psi and 30 psi.
NOTE:
If the pump is equipped with an earlier
adjustable pressure switch, it should be replaced
when it fails or falls out of adjustment . For
pump models - 1000 and above no conversion kit
is necessary. Pumps below - 1000 require a ser-
vice conversion kit.
Figure 21-Inspecting Dampener
LIVING AREA WATER SYSTEM 24J- 13
Figure 22-Water Pump With Pressure Switch