3
(4) TROUBLE DIAGNOSIS
(I) When Pump runs.
(A) Low output pressure or delivery.
(a) On up stroke - 1.Check 19 (fig.3) Valve seat within 6 (fig.3) Coupling.
2.Check 10 (fig.3) Packing.
(b) On down stroke - 1.Check 19 (fig.3) Valve Seat within 13 (fig.3) Check Valve Packing Retainer.
2.Check 12 (fig.3) Packing & 11,12 (fig.3) Guide.
(c) On both strokes - 1.Insufficient air pressure - Increase air pressure.
2.Refer to (I) (B).
3.Refer to (I) (A) (a) & (I) (A) (b).
4.Replace 8 (fig.3) Guide, 9 (fig.3) Washer, 10 (fig.3) Packing, 11 (fig.3) Guide, 12 (fig.3)
Packing & 14 (fig.3)Guide. If 34 (fig.2) Packing or 33 (fig.2) Bearing worn-out, replace
it.
(B) No lubricant delivery
(a) Lubricant drum may be empty - Replenish lubricant or replace with new lubricant drum.
(b) Lubricant is too heavy to absorb - Use 81921 or 81922 Follower Plate (to be ordered separately) or thin it
with clean machine oil.
*(c) The Fluid line within Pump is being clogged by foreing matter.
- Clean the fluid line of 6 (fig.3) Coupling, 13 (fig.3) Check Valve Packing
Retainer, 15 (fig.3) displacement Tube.
(II) When Pump fails to run
(A) Continuous air leakage from exhaust.
Check Air Motor - Check 24 (fig.2) Lockwire, 11 (fig.2) Stem Valve, 25 (fig.2) Adjusting Nut, 28 (fig.2) Puppet
Rubber Valve, 12 (fig.2) O-ring & 16 (fig.2) O-ring.
(B) No air leakage.
(a) Check air supply line - 1. Air line is being clogged.
2. Insufficient air pressure - Increase air pressure.
*(b) Pump is stopped by foreing matter between 18 (fig.3) Priming Tube & 17 (fig.3) Priming Plunger.
- Loosen 18 (fig.3) Priming Tube and clean 15 (fig.3) Displacement Tube, 18 (fig.3)
Priming Tube, 17 (fig.3) Priming Plunger.
* A 40651 Strainer is recommended to prevent foreing matter clog Pump.
(5) MAINTENANCE
The pump will be reparaid by replacement or adjustment for only the necessary parts in judgement from out-looking
troubles on the pump and unnecessary disassembly should be avoided. In some long time use, it may be required to overhaul
the pump so as to remedy decreasing efficiency caused by worn packing and others. If you are using a repair kit to service
the pump, use new parts, even if the old one look good. The old parts will wear faster making pump service needed again
sooner. Use 40650 Repair Pack for Air Motor, 8040660 Repair Pack for Displacement Tube.
