Allmand — 2. Repair Procedure.

A Allmand service procedure — check it applies to your exact model before use.

Procedure

There are 2 possible causes for lack of pressure. (1) The adjusting screw has backed up. (2) Foreign matter or “dirt” is trapped between the seat and the ball or cone.
Repair as follows: (1) Using a gauge, tee’d into the pressure line, loosen the jam nut and turn the adjusting screw clockwise a turn or two and watch the gauge; if it goes up, continue to turn the screw until the required setting is reached. Retighten the jam nut. In the “Old Style” relief, if the screw does not remain in the correct position use one with a patch. (In an emergency the screw threads can be deformed slightly with a small prick punch and hammer). (2) Ifthe pressure does not increase when the adjusting screw is tightened; turn the adjusting screw counterclockwise all the way out; energize the pump to “flush” the dirt past the seat. Inspect the cone or ball for nicks and replace it if necessary; reseat the ball or cone using a small drift punch and hammer with a light tap; reinstall the spring and adjusting screw and reset the pressure. (3) If you are replacing a cartridge relief valve it cannot be readily disassembled. Push a blunt object into the nose area to push the poppet after you have the screw backed off as far out as possible. Blow compressed air thru side port to try and get dirt to “exit” the way it “entered”. Pick it out if possible. If you cannot dislodge the contami- nation you will need to replace the cartridge. (4) If the above mentioned procedure fails to increase the relief valve setting, check for a worn pump or leaking cylinder. Note: Do not use teflon tape on hydraulic fittings as it can easily jam valves and plug the filters in the system. A WARNING * Always wear eye protection and protective clothing when working on and around hydraulic systems. ° Remove jewelry and objects that might conduct electricity while working on power units. * Hydraulic fluid does pose a fire harard, can cause burning or skin irritation if not properly handled. ¢ Fluid under pressure can pierce the skin and enter the bloodstream causing death or serious injury. * Devices being operated by the hydraulic system should be immobilized so they cannot move and cause injury while being inspected or repaired. Disconnect from electrical source. ° Prior to performing any maintenance make sure the equipment is turned off and that any stored energy, for example pressure, is released. Also, extended equipment or cylinders should be lowered and mechanically locked as required. ¢ Monarch Hydraulics is not responsible for misuse or misapplication of product. If you have any questions about application, please concact local dealer. * Fluids should be contained and disposed of prop- erly. CHECK VALVES

Source: manual:hydraulic_power_unit_v-series_monarch_relief_valve_adjustment_and_parts_list.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.