Drive Housing - Graco EM 5000 Instructions-Parts List Manual

WARNING
To reduce the risk of serious injury, including fluid
injection or splashing in the eyes or on the skin, or
injury from moving parts, always follow the Pres-
sure Relief Procedure Warning on page 6
before checking, adjusting, cleaning, or shutting of
the sprayer. Unplug the power supply cord!
NOTE: Refer to Fig 21 for this procedure.
Disassembly
1. Remove the front cover and screws (23,68). Re-
move the spring clips (100,102) and the bypass hose
(101).
2. Disconnect the pump outlet hose from the displace-
ment pump nipple (49).
3. Use a hex key wrench to remove the four screws (73)
and lockwashers (74) from the bearing housing (21).
4. Lightly tap the back of the bearing housing (21) with
a plastic mallet. Pull the pump, bearing housing and
connecting rod away from the drive housing as one
assembly.
5. Use a hex key wrench to remove the two screws (24)
and lockwashers (11) from the bottom front of the
drive housing (20). Remove the four screws (10) and
lockwashers (11).
6. Lightly tap around the drive housing (20) with a plas-
tic mallet to loosen it from the pinion housing (19).
TORQUE T0
(16–18 N.m)
74
73
23
68
Fig. 21

Drive Housing

TORQUE T0 (5.8 N.m)
20b
20a
20
22
Do not drop the gear cluster (18) when removing the
drive housing (20). The gear cluster is easily dam-
aged. The gear may stop engaged in the drive
housing or pinion housing.
Do not lose the thrust balls (20c or 19d) located at
each end of the gear cluster, or allow them to fall
between the gears. The ball, which is heavily cov-
ered with grease, usually stays in the shaft recesses,
but could be dislodged. If the balls are caught be-
tween the gears and not removed, they will seriously
damage the drive housing. If the balls are not in
place, the bearing will wear prematurely.
Reassembly
7. Liberally apply bearing grease (20d, supplied) to the
gear cluster (18). Be sure the thrust balls (20c and
19d) are in place.
8. Place the bronze colored washer (20a) and then the
silver–colored washer (20b) on the shaft protruding
from the big bearing of the drive housing (20). Align
the gears and push the new drive housing straight
onto the pinion housing and locating pins (B).
9. Starting at Step 6, work backwards to reassemble
the sprayer. Or, move ahead to the next section in
this manual if further service is needed.
11 10
19
11
19d
18
20c
11
24
21
TORQUE T0 (5.8 N.m)
49
100
101
102
NOTE: Lightly tighten screws 73,10 and
24 oppositely and evenly. Then
tighten oppositely and evenly
again to the specified torque.
CAUTION
B
10
TORQUE T0 (5.8 N.m)