Drive Housing, Connecting Rod, Crankshaft
WARNING
To reduce the risk of serious injury, follow the
Pres-
sure Relief Procedure Warning
on page 21 be-
fore doing this procedure. Unplug the sprayer!
NOTE:
Inspect parts as they are removed. Replace
parts that are worn or damaged.
1. Remove the displacement pump. See page 24.
2. Remove the shroud (4).
3. Lower the control card (47) and remove the pres-
sure transducer (29). See page 32.
107
19,6
Fig. 27
01074
4. Turn the displacement pump rod (107) so the pin
hole aligns with the bottom drive housing screw
(19). See Fig. 27. Remove the three drive housing
screws and lockwashers (19,6). Also see Fig. 28.
5. Remove the two motor screws and lockwashers
(5,6). See Fig. 28.
6. Tap the lower rear of the drive housing (11) with a
plastic mallet to loosen the motor. Pull the drive
housing straight off the motor.
CAUTION
Do not allow the gear (16) to fall; it may stay at-
tached to the drive housing or to the motor.
Do not lose the thrust balls (11a or 4a) or let them
fall between the gears, which will damage the drive
housing if not removed. The balls, which are heav-
ily covered with grease, usually stay in the gear
recesses, but could be dislodged. If the balls are
not in place, the bearings will wear prematurely.
7. Remove and inspect the crankshaft (12) and the
connecting rod (15). Replace all damaged or worn
parts.
8. Install the connecting rod.
9. Lubricate the inside of the connecting rod bearing
with SAE non-detergent oil. Pack the roller bearing
and gears with the grease supplied.
NOTE:
The gears and bearings between the drive
housing (11) and motor front end bell (C) should con-
tain a total of 3 fl oz (29 cc) of grease.
10. Place the large washer (12a) and then the small
washer (12b) on the crankshaft (12).
11. Rotate the crank to the top of the stroke and insert
crankshaft (12). Align the gears and push the drive
housing (11) straight onto the motor and the locat-
ing pins. Install the screws (19, 5) and their lock-
washers (6). Torque to 80 in–lb (9 N.m).
12. Install the pressure transducer. See page 32.
13. Install the displacement pump. See page 24.
14. Install the front cover (13).
15. Replace the shroud (4).
