
Page Number - 4
DISASSEMBLY Tools
Required
2-1/8" Dia. Strap Wrench
Retaining Ring Pliers (External)
Retaining Ring Pliers (Internal)
11/16" Hex Wrench
7/8" Hex Wrench
13/16" Hex Wrench
1-3/8" Hex Wrench
2-1/4" Hex Wrench
Pliers
Procedure
1. Remove Priming Tube (Item 42)
from Adapter Tube (Item 30).
2. Remove Cotter Pin (Item 40) from
from Priming Plunger (Item 39).
3. Remove Priming Shovel (Item 41)
from Priming Plunger (Item 39).
4. Unscrew Adapter Tube (Item 30)
from Pump Tube (Item 21) and
slide off of Piston Assembly (Items
25, 27 & 28).
5. Remove Priming Plunger (Item 39)
from Piston Body (Item 28).
6. Remove Check Seat (Item 38) and
O-ring (Item 37) from Adapter Tube
(Item 30).
7. Remove Check Assembly (Items
31, 32, 33, 34, 35, & 36) from
Adapter Tube (Item 30).
8. Remove Retaining Ring (Item 31)
and Guide Washer (Item 32) from
Check (Item 36).
9. Remove Retaining Ring (Item 33),
Packing Washer (Item 34) and U-
cup Packing (Item 35) from Check
(Item 36).
10. Remove Lube Cup (Item 4) from
Gland Nut (Item 6).
11. Remove Bolt Connector (Item 1)
from plunger (Item 3).
12. Pull Piston Assembly (Items 25,
27 & 28) to remove Plunger (Item
3), Connecting Rod (Item 23),
Adapter (Item 24) and Piston
Assembly from Pump Tube (Item
21).
13. Remove Pump Tube (Item 21)
from Outlet Body (Item 12).
14. Remove O-ring (Item 20) from
Outlet Body (Item 12).
15. Remove Gland Nut (Item 6) from
Outlet Body (Item 12).
16. Remove Sleeve (Item 11) from
Outlet Body (Item 12).
17. Remove Priming Plug (Item 13)
and Adapter (Item 14) from Outlet
Body (Item 12).
18. Remove Outlet Body (Item 19)
from Outlet Body (Item 12).
19. Remove Ball (Item 17), Check Seat
(Item 16) and Gaskets (Item 15)
from Outlet Body (Item 12).
20. Remove Retaining Ring (Item 10),
Packing Washer (Item 9) and U-
cup Packing (Item 8) from Gland
Nut (Item 6).
21. Remove Piston Adapter (Item 25)
from Adapter (Item 24).
22. Remove Ball (Item 17) from
Adapter (Item 24).
23. Remove Cotter Pins (Item 22) from
Connecting Rod (Item 23).
24. Remove Adapter (Item 24) and
Plunger (Item 3) from Connecting
Rod (Item 23).
25. Unscrew Piston Adapter (Item 25)
and remove Piston Collar (Item 27)
from Piston Body (Item 28).
26. Remove U-cup Packings (Item 26)
from Piston Adapter (Item 25) and
Piston Body (Item 28).
Problem Possible Cause Solution
Pump does not operate. Restricted or inadequate air supply. Check air supply pressure and air hose
diameter (see Airmotor manual for
minimum air supply hose diameter).
Obstructed material output. Check output line for restrictions.
Erratic or accelerated operation. Pump is not primed. Prime pump (see "Pump Priming"
instructions).
Ins ufficient m aterial supply. Refill material supply.
Material is too heavy for priming. Lower output with material valve. Increase
pressure to pressure primer (if in use).
Check for inlet restrictions.
Pump operates on "down" stroke only Worn or damaged Piston U-cups (Item26) Check and replace if needed.
(missing "up" stroke). or Piston Check (Items 17 & 25).
Pump operates on "up" stroke only Worn or damaged Inlet Check (Items 36 Check and replace if needed.
(missing "down" stroke). & 38).
Insufficient material supply. Pump is not Check inlet for restrictions. Lower output
intaking enough material to dispense on with material valve.
both strokes.
Pump is operating but not dispensing Inlet Check (Items 36 & 38) is not seating Check and replace if needed.
material. or is damaged.
TROUBLESHOOTING
PUMP REPAIR KITS
988713 - Includes soft parts for Part No. 988530
988714 - Includes soft parts for Part No. 988533
988838 - Includes soft parts for Part No. 988532 & 988837
988841 - Includes soft parts for Part No. 988535 & 988840