306746
11
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 8.
Before You Start
D
To reduce downtime, be sure you have all neces-
sary repair parts available. Recommended spare
parts are listed in the
Parts List
on page 14 with an
asterisk (*).
D
Packing repair kits are available for both the 24:1
and 48:1 pumps (see
Parts List
on page 14). If you
have a repair kit, use all the new parts for the best
results. Parts included in the repair kits are marked
with a double asterisk (e.g., 28**).
D
Whenever you replace the packings, also replace
the glands and bearing.
D
When cleaning parts, use a compatible solvent.
Inspect parts for wear or damage and replace as
necessary. Scoring or irregular surfaces on the
booster rod (35) or the displacement rod (33 or 59)
causes premature packing wear and leaking. Check
these parts by rubbing a finger on the surface or
holding them up to the light at a slight angle.
D
Use light, water–proof grease whenever grease is
mentioned.
D
Check all possible problems and solutions before
disassembling pump.
Problem
Cause
Solution
Pump fails to operate.
Restricted line or inadequate air
supply.
Clear; increase air supply.
Obstructed fluid hose, gun, or dis-
pensing valve.
Clear*.
Exhausted fluid supply.
Refill and prime**.
Fluid dried on displacement rod.
Clean***.
Damaged air motor.
Service; see manual 306982.
Pump operates but output is low on
both strokes.
Restricted line or inadequate air
supply.
Clear; increase air supply.
Obstructed fluid hose, gun, or dis-
pensing valve.
Clear*.
Exhausted fluid supply.
Refill and prime**.
Open or worn bleeder valve.
Close; replace.
Air in displacement pump and hose.
Reprime; use bleeder valve, induc-
tor, or ram.
Fluid too heavy for pump priming.
Use bleeder valve, inductor, or ram.
Obstructed or worn intake or check
valve.
Clear; service.
Worn throat packings.
Replace.
Erratic or accelerated operation.
Exhausted fluid supply.
Refill and prime**.
Obstructed or worn intake or check
valve.
Clear; service.
Connecting rods out of alignment.
Adjust.
*Follow the
Pressure Relief Procedure
on page 8. Disconnect the fluid hose. Turn on the air just enough to start
the pump; if pump starts, the obstruction is in the fluid hose, gun, or valve.
** Stop pump immediately. Refill and prime to remove all air from system, or flush pump and store with mineral spir-
its in it.
***To help avoid this problem, always stop the pump at the bottom of its stroke, and keep TSL in wet–cup.
