Graco Merkur ES, Instructions Manual

Page: 19 / 50

Repair
3A0732U 19
4. Follow the Reconnect the Reconnect the
Displacement Pump , pg 19.
Reconnect the Displacement
Pump
1. Screw the displacement pump into the adapter
plate (10) until it stops. Back off pump less than 1
turn, to align pump outlet as desired.Tighten the
jam nut (13). Torque to 65-75 ft-lb (88-102 N•m).
2. Align the hole in the displacement rod with the hole
in the air motor rod. Use a screwdriver to push in
the pin (18).
3. Push the retaining spring (19) into place to cover
the pin.
4. Fill throat packing nut wet-cup (103) with TSL to
prevent premature packing wear.
Repair Air Valve
Replace Complete Air Valve
1. Stop the pump. Follow Pressure Relief
Procedure , page 10.
2. Disconnect the air line to the motor.
3. See F
IG
. 18 on page 25. Remove four screws (211).
Remove the air valve (214) and gasket (209*
◆
).
4. To repair the air valve, go to Disassemble the Air
Valve, page 20. To install a replacement air valve,
continue with step 5.
5. Align the new air valve gasket (209*
◆
) on the
manifold, then attach the air valve (214). Torque
screws (211) to 95-105 in-lb (11-12 N•m).
6. Reconnect the air line to the motor.
Replace Seals or Rebuild Air Valve
F
IG
. 11: Intake housing assembly
119
117
116‡
110
111‡
109
107‡
105
NOTICE
The displacement pump can be damaged if the
stroke is not centered when the pump is recon -
nected. Be sure to fully screw the displacement
pump into the adapter plate (10).