Vestil HIPM series - Manual (Page 13)

13
Features:
Your new lift equipment has been supplied with an exclusive two-speed foot pump. The internal features of your pump
include a primary pressure relief valve, pressure compensated return flow control valve, and an integrated lowering
valve.
Replaceable bushings, valve components, and seals have been utilized in the construction of the pump in the event
that replacements are necessary.
Operating Instructions:
Stay clear of moving parts. The platform will rise as the foot pedal is pumped. Depressing the release lever will lower
the table at a controlled rate of descent.
In the event the platform has been overloaded, the pressure relief will open because of excessive pressure build-up
in the hydraulic system. Oil will bypass into the reservoir. Never change the pressure relief setting. Do not exceed
the rated capacity of your lift equipment.
Speed Selection for Two-speed Pumps:
This pump offers two "speeds". The low speed produces low volume/high pressure. The high speed produces high
volume/low pressure. The operator has the option of selecting the optimum pump speed for the application at hand.
Pump speeds are selected by sliding the "lock collar"(See item # 2A on the parts identification) in or out. An occasional
drop of oil will keep the collar working freely.
Operating Instructions for Two-speed Hydraulic Foot Pump
Air Bleed Procedure:
Whether your pump is a new installation, or has been recently serviced, air has likely entered the hydraulic
system. The design of this pump includes an "air bleed screw" which will aid in the removal of unwanted air from
the foot pump area of the hydraulic system. Use the following steps to remove this air from the system.
1) Check all fittings to be sure they are tight. Ensure that the oil is filled to within 1" of the top of the reservoir
when the lift is in the fully lowered position.
2) Locate the "air bleed screw"( See item # 33 on the pump body) and loosen appoximately 1/2 turn
couterclockwise. As soon as you have loosened the screw, slowly depress the foot pedal. This will force the air
out of the pump chamber. Before you let the pump pedal return to the "up" or "home" position, tighten the air
bleed screw. This will prevent air form re-entering the pump chamber. Repeat the above procedure until the
pump chamber is completely filled with oil and a "spongy" feel is no longer present. If the air bleeding procedure
has been successful, the feel of the pump pedal will be firm and the complete stroke of the pump will produce
fluid flow.
LOCK COLLAR
AIR BLEED SCREW
LOWERING VALVE
PRESSURE RELIEF VALVE
PRESSURE
CHECK
VALVE
2 SPEED
FOOT PUMP
PRESSURE
CHECK VALVE
ADJ. PRESSURE
RELIEF VALVE
LOWERING
VALVE
PRESS. COMPENSATED
FLOW CONTROL 1 GPM
TO CYLINDER