Hydroworks 8725939 Manuel D'instructions

HI-LOW HYDRAULIC GEAR PUMPS
MODELS 8725939 & 8725947
Toubleshooting Chart
SYMPTOM POSSIBLE CAUSE (S)
1. System relief valve set too low or
Pump does not
leaking
Develop full pressure
2. Oil temp is too high
3. Pump is worn out
4. Double acting cylinder piston seals
are cut or worn out
1. Lose connection
Motor won't start
2. Circuit breaker tripped
3. Voltage drop
4. Seized pump
1. No oil in reservoir
Will not pump oil
2. Motor rotating wrong direction
(motor runs but cylinder
does not move, or moves
3. Oil level low
slow
4. Suction strainer is clogged
5. Double acting cylinder piston seals
are cut or worn out
6. Reservoil breather is dirty or clogged
1.Low oil level
Pump motor unit is noisy
2.Air in system
3.Suction strainer or inlet filter is
clogged
Description
Our two stage, hi-low, external gear hydraulic pump, models 8725939 & 8725947 are designed to be direct-
driven by gas engines or electric motors. They are suited for use in log splitters and other applications, such as:
hydraulic lifts, platform lifts, die tables, automatic hoists, trash compactors, bench presses, machine tool lube
systems, filter systems, clamping devices, and transfer systems, etc. They are ideal for press-type applications
requiring fast approach/retract speeds and slower peak actuator work speeds because of horsepower limitations
or safety constraints.
INSTRUCTION MANUAL
CORRECTIVE ACTION
1. Check system relief valve for proper
setting with pressure gauge in
outlet line
2. Let oil cool below 140°F
3. Replace worn parts or pump
4. Replace or repair cylinder
1. Check wiring
2. Reset circuit breaker
3. Use heavier gauge wire
4. Replace pump
1. Check oil level, refill
2. Change rotation of prime mover or
Reverse inlet and outlet hoses
3. Add oil as needed
4. Clean suction strainer
5. Replace or repair cylinder
6. Clean reservoir breather and reinstall
1. Add oil as needed
2. Bleed air from highest fitting in
system by loosening fitting very
slightly and operating unit bubbling
of air stops, then tighten.
3. Clean suction strainer or inlet filter
1 OF 5
HI-LOW HYDRAULIC GEAR PUMPS
Unpacking
Due to cast iron construction. Very little damage can occur during transit. Do not remove the plastic
shipping plugs from the ports until ready for installation. This will keep dirt or foreign material from
entering the system.
Specifications
Stage ................................................................................................................................................ 2
Max. Operating Speed ....................................................................................................... 3600 RPM
Construction ..................................................................................... Front End: Iron, Body Aluminum
Unloader Valve Setting ............................................................................................................ 650PSI
Mounting ......................................................................................................................... 4-Bolt 4F17
Shaft Length ..............................................................................................................................1.378"
Shaft Diameter ........................................................................................................................... 0.5"
Inlet ................................................................................................................................ 1" dia. Tube
Outlet..................................................................................................1/2" - 14 NPT
Pump Rotation .................................................................................................................... Clockwise
2
0.125
3
5.1413
NPT1/2''
C
Outlet
B
D 8725939
Inlet
8725947
INSTRUCTION MANUAL
A
0.28
1.378
1
0.1181
Hydraulic Symbol
Outlet
DIMENSIONS
MODEL
A B C
5.11" 2.74" 4.24"
5.62" 3.31" 4.65"
2 OF 5
Inlet
D
1"
1"