Manual

Model 5-025, 5-050, 5-075 & 5-150
13
Trained Dake personnel with complete rebuilding and testing facilities permit rapid overhaul and
testing, resulting in minimum downtime for the customer, as well as the added advantage of
complete factory testing after repair.
TROUBLE SHOOTING CHART
TROUBLE POSSIBLE CAUSE REMEDY
Inadequate or no
flow from pump.
1. Inlet line above fluid level.
2. Air in suction.
3. Pump not primed.
4. Broken drive shaft or coupling. Loose
coupling.
5. Oil viscosity too high.
6. Dirty or clogged oil suction filter.
7. Broken piston return spring item NN
or check valve spring item DD.
1. Check fluid level and provide
adequate fluid to fill entire system.
2. Check for loose inlet line
connections.
3. Fill pump cast with Mobil DTE 24
oil or equivalent and run until
pump picks up prime.
4. Replace broken parts and tighten
setscrews in coupling.
5. Use proper viscosity fluid for
operating temperature conditions.
6. Clean filter and check at least
once a month.
7. Replace broken parts and
reassemble.
Pump will not
build pressure.
1. Loose check valve seat retainer items
BB.
2. System relief valve stuck open.
1. Retighten loose parts. Use
locktight when retightening.
2. Check valve for contamination.
Pump is running
hot.
1. System relief valve constantly spilling.
2. Duty cycle excessive at high pressure.
1. Check relief valve setting and work
cycle.
2. Install oil cooler on fluid reservoir.
Noisy pump or
system.
1. Air in system.
2. Pump cavitating.
3. Coupling misalignment.
4. Broken piston return spring item NN.
5. Loose piston shoe item L.
1. Bleed all circuit trapped areas.
2. Check for restriction in pump inlet
or loose fittings in inlet line.
3. Realign couplings.
4. Replace broken parts and
reassemble.
5. Replace with new parts items L
and M.
Pump will not
prime or looses
prime.
1. Loose cylinder locking screws items
W.
2. Worn or damaged shaft seals items C
or AC.
3. Faulty o-ring items V, MM, TT or AB.
4. Air in suction.
1. Tighten screws.
2. Replace with new parts.
3. Replace with new parts.
4. Check for loose fittings and
tighten.
724 Robbins Road
Grand Haven, MI 49417
Phone: [phone]
Fax: [phone]
Web: www.dakecorp.com
E-mail: [e-mail]
[e-mail]