
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).
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).
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).
4. Unscrew Adapter Tube (Item 30) from 14. Remove O-ring (Item 20) from
Pump Tube (Item 21) and slide off of Outlet Body (Item 12). 25. Unscrew Piston Adapter (Item 25)
Piston Assembly (Items 25, 27 &and remove Piston Collar (Item 27)
28). 15. Remove Gland Nut (Item 6) from from Piston Body (Item 28).
Outlet Body (Item 12).
5. Remove Priming Plunger (Item 39) 26. Remove U-cup Packings (Item 26)
from Piston Body (Item 28). 16. Remove Sleeve (Item 11) from from Piston Adapter (Item 25) and
Outlet Body (Item 12). Piston Body (Item 28).
6. Remove Check Seat (Item 38) and
O-ring (Item 37) from Adapter Tube 17. Remove Priming Plug (Item 13) and 27. To re-assemble pump, reverse
(Item 30). and Adapter (Item 14) from Outlet disassembly procedure. (Refer to
Body (Item 12). illustration for torque specifications.)
7. Remove Check Assembly (Items 31,
32, 33, 34, 35, &36) from Adapter
Tube (Item 30).
TROUBLESHOOTING
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).
Insufficient material 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 (Item 26) 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.
OPTIONAL PACKING KITS (Includes Items 8, 26 &35)
86223 Teflon Packing Kit -For Models 84976 &84977.
86224 Teflon Packing Kit -For Models 84978 &84979.
86225 UHMW Polyethylene Packing Kit -For Models 84976 &84977.
86226 UHMW Polyethylene Packing Kit -For Models 84978 &84979.
86227 Viton Packing Kit -For Models 84976 &84977.
86228 Viton Packing Kit -For Models 84978 &84979.
PUMP REPAIR KITS
86229- Includes soft parts for Models 84976 &84977.
86230- Includes soft parts for Models 84978 &84979.