PREPARING PRESS FOR SERVICE

TM 94940-539-14&P

A. PREPARING PRESS FOR SERVICE

Presses are shipped completely assembled so they are ready for service after filling the pump reservoir with the

correct oil and after completing the following operations:

DO NOT MOVE PUMP PLUNGER BEFORE FILLING RESERVOIR WITH OIL.

1. Cut the straps which hold the various accessories and movable parts in place during shipment.

2. Fill the pump reservoir to just below the return elbow with clean SAE #10 or ;#20 engine oil. Light spindle oil also may

be used. DO NOT USE BRAKE FLUID.

3. Turn the winch crank clockwise just enough to release the table supporting pins. After removing the pins, raise the

table to the top of the frame. Carefully align the table and frame holes. Install the pins and back off just enough to

relieve the cable tension. NEVER EXERT PRESSURE ON THE TABLE WITH THE SUPPORTING PINS OUT OF

PLACE.

4. With both valves closed, RAM DOWN & SPEED FAST, stroke pump until the press ram is fully extended. Then open

release valve, RAM UP position, allowing ram to retract. Repeat this operation several times to remove air from the

system.

5. Put table blocks in position on the table. With both valves CLOSED, pump the ram down against the table blocks.

Next open the high speed pump valve, SPEED SLOW, located on the right side of the pump. Now pump press to

maximum pressure, causing relief valve to relieve, eliminating any remaining air from the system.

The press is now ready for service. Study the following instructions to become familiar with its use and features.

B. EXPLANATION OF HYDRAULIC CIRCUIT AND OPERATION OF CONTROLS

The hand operated pump is equipped with two plungers; the smaller one is, for developing high hydraulic pressure

(6000-10, 000 PSI), the larger one is for delivering a larger volume of fluid at lesser pressure (1200-1500 PSI). The unit

has two control valves: one for releasing fluid which has been pumped into the cylinder circuit, the other for eliminating or

using the high volume pump as desired. Also incorporated in the circuit is a high pressure relief valve which controls a

predetermined maximum pressure of the high pressure pump only.

C. TO PERFORM A PRESS OPERATION

Turn both the cylinder control valve (left side)and the high volume pump valve (right side) to the RAM DOWN &

SPEED FAST position (right hand rotation). Now make complete strokes of the pump handle until the cylinder ram

contacts the work piece. If possible, continue to use the high speed pump to do the work; if not, turn the high volume

pump valve to the SPEED SLOW position (left hand rotation). Continue to pump until desired ram travel or cylinder thrust

has been accomplished. Turn cylinder control valve to RAM UP position (left hand rotation) to release pressure or return

ram to the retracted position.

Inasmuch as the fast pumping feature can be put in or out of the circuit at will, the following can be accomplished by

correct valve manipulation. Some work can be pumped fast to start, but requires higher pressure to complete. In this

case change from the high speed pumping position to low speed. (Turn high speed pump to the SPEED SLOW position.)

This is usually true when assembling parts. Frequently when disassembling ports high pressure is required to start, but as

completion nears, the high speed pump can be used. In this case, turn the high speed pump valve to the SPEED FAST

position.