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44 313289S
Pump Assembly
Prior to servicing the pump assembly you must first
remove either the entire pump assembly or the displace-
ment pump and air motor individually.
Remove Pump Assembly
1. Follow Pressure Relief Procedure, page 12.
2. Close ball valve on hopper outlet assembly.
3. Disconnect displacement pump from fluid inlet
assembly.
•
50:1 Pump:
disconnect reducer bushing fitting
from swivel fitting on fluid inlet assembly.
•
70:1 Pump:
disconnect reducing swivel from
fluid inlet assembly.
NOTE:
Refer to the Double Wall Hopper manual 312747 to ser-
vice or repair the fluid inlet assembly.
4. Disconnect air motor.
a. Disconnect sensor cable, air line, and ground
wire from air motor.
b. Remove mounting screws (4) and washers (3)
holding air motor (2) to mounting bracket. See
illustration in Remove Air Motor section.
5. Remove pump assembly by lift ring on air motor.
6. Refer to Xtreme Displacement Pump manual
311762 to service or repair the displacement pump.
Refer to NXT Air Motor manual 311238 to service or
repair the air motor.
7. Follow steps in reverse order to reinstall pump
assembly.
Remove Displacement Pump
Follow these instructions for removing only the displace-
ment pump; the air motor will remain installed.
1. Follow Pressure Relief Procedure, page 12.
2. Disconnect displacement pump from fluid inlet
assembly. See steps 2 and 3 under Remove Pump
Assembly, page 44.
3. Remove clip (133), and slide coupling cover (134)
up to remove coupling (132).
r_256170_312747_6d
Reducing
Swivel
Swivel Fitting
Reducer
Bushing
Ball Valve
Do not lift pump assembly by the lift ring when the total
weight of the pump assembly exceeds 550 lb (250 kg).
ti8264a
132
134
133