Gardner Bender 1 1_8 HP Titan Pumps - Manual (Page 7)

Only qualified hydraulic technicians should service
the pump or system components. A system failure
may or may not be the result of a pump malfunction.
To determine the cause of the problem, evaluate
the complete system as part of the
diagnostic procedure. The following information is intended to be used
only as an aid in determining if a problem exists. For
repair service, contact your local service center. For
the location of an Authorized GB Electrical Service
Center in your area, use phone number listed on
back cover.
■
TROUBLESHOOTING
Symptom
Pump will not
start
Motor stalls
under load
Electrical valve
will not operate
Pumps fails to
build pressure
Pump does
not reach full
pressure
Pump builds full
pressure, but load
does not move
Cylinder drifts
back when it
should be holding
load
Single-acting
cylinder will not
return
Double-acting
cylinder will not
Possible Cause
1. no power
2. wrong voltage
1. low voltage
1. no power or wrong voltage
2. valve out of adjustment
1. external leak in system
2. internal leak in pump
3. internal leak in valve
4. internal leak in system
component
1. relief valve setting too low
2. external leak in system
3. internal leak in pump
4. internal leak in valve
5. internal leak in system
component
1. load exceeds cylinder rating
2. flow to cylinder blocked
1. external system leak
2. internal leak in system
component
1. no load on a “load
return” cylinder
2. return flow restricted
or blocked
3. return spring damaged
or broken
4. valve malfunction
1. return flow restricted
or blocked
2. valve malfunction
Solution
1. check electrical power source
2. see voltage specifications on page 2
1. check electrical power source;
see voltage specifications on page 2
2. use shorter power cord
1. check valve power connection to pump
2. contact your local Authorized GB Service Center
1. trace circuit, checking all connections and components
2. contact your local Authorized GB Service Center
3. contact your local Authorized GB Service Center
4. repair or replace leaking system component
1. reset relief valve (see page 4)
2. trace circuit, checking all connections and components
3. contact your local Authorized GB Service Center
4. contact your local Authorized GB Service Center
5. repair or replace leaking system component
1. decrease load or use higher capacity (tonnage) cylinder
2. loose coupler connection; check that all couplers are
completely connected and hand tightened
1. trace circuit, checking all connections and components
2. repair or replace leaking system component
1. load cylinder with enough weight to make it retract
2. loose coupler connection; check that all couplers are
completely connected and hand tightened
3. test circuit using a cylinder known to work;
repair or replace damaged cylinder
4. contact your local Authorized GB Service Center
1. loose coupler connection; check that all couplers are
completely connected and hand tightened
2. contact your local Authorized GB Service Center
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