Napa PROFESSIONAL LIFTING EQUIPMENT 791-1250 A Manuel De Fonctionnement page 3

operaTing manual & parTs lisT for 791-1250 a
SETUP
1. Remove the plug fittings in the air and hydraulic access holes. The threaded air inlet hole is at the end of the pump where the word
"pump" is on the foot pedal. The threaded hydraulic hole is at the opposite end of the pump. Remove any remnants of teflon tape or
thread sealer from the holes before installing hoses or air disconnect fittings.
2. Make sure the hose fitting threads are not cross threaded. Use at least 1-1/2 wraps of teflon tape (or suitable sealant) on the threads.
Make sure the first complete thread is free from tape or sealant so they do not enter and contaminate the hydraulic system.
3. Install the air quick disconnect configuration of your choice in the threaded hole back by the foot pump pedal labeled "pump". Apply
teflon tape or sealant to the threads as instructed in step 2 before installation. At the other end of the pump, install the hydraulic hose in
the same manner.
4. If tubing is used instead of hose, make sure the tubing is supported. Unsupported tubing can lead to premature fitting failure. Always hard
mount valves and gauges and never allow tubing to support them. Place tube supports 4 to 7 inches behind the fitting.
5. The top forward section of the pump includes an air vent screw that is closed during shipment. The screw must be turned counter-
clockwise two complete turns before the pump is operated. The pump will not work to its maximum efficiency unless the air vent screw is
opened.
6. An in-line filter/regulator/lubricator should be installed close to pump. Add a few drops of SAE 30 oil to the air intake weekly if no
lubricator is used or when pump will be idle for a long time.
OPERATING INSTRUCTIONS
This is the safety alert symbol used for the OPERATING INSTRUCTIONS section of this manual to alert you to potential personal
injury hazards. Obey all instructions to avoid possible injury or death. IMPoRtANt: In order to prevent seal damage and jack failure,
never use alcohol, hydraulic brake fluid or transmissions oil in the jack.
1. Determine the layout of your hydraulic system based on the work to be performed. If the pump is used with a ram in collision repair work or
in a press as a power source, there will most likely not be a need to consider installing a flow control valve. If the pump is used with a ram
that activates a shop crane boom or any other mechanical leverage that would increase the rate of descent of such leverage when the
pump pedal is released, install a flow control valve between the pump and the ram.
IMPORTANT: Before using the pump under load, become familiar with the operating of the foot pump. Depressing the foot pedal end
marked "pump" activates the ram. To activate the ram a small distance, it is necessary to use incremental taps of your foot on the foot
pedal until the ram reaches the desired distance. Retracting the ram is accomplished by depressing the foot pedal end marked "RELEASE".
The pump is equipped with a two speed release mechanism. Gently depressing the foot pedal end marked "RELEASE" retracts the ram
slower then if you depress the pedal all the way down. If you want to retract the ram slower than the low speed release, use gentle
incremental taps of your foot on the "RELEASE" pedal.
2. Be sure hoses do not have cracks, kinks, cuts or other damage which might cause the hoses to leak. If hoses include spring guards, make
sure the springs protect the crimped areas of each end of the hose.
3. Hose should not be twisted or bent too sharply. The bend radius should not be less than nine times the outside diameter of the hose.
Always use as few bends as possible.
4. Make sure all hose ends, couplers, or union ends are clean and threads are in good condition.
5. Make sure all hose connections between pump and rams are tight and leak free. Do not over-tighten connections. Excessive
tightening may cause premature thread or fitting failure.
6. `When using quick disconnect fittings, make sure fittings are correctly and completely fastened together.
791-1250 A 3 05/04/09