INSTRUCTION MANUAL – HYDRAULIC HAND PUMPS:
Model Series: HP110, HP227-257, HP211-252D, HPX1500-2800
Hi-Force Limited – Prospect Way – Daventry – Northants NN11 8PL – United Kingdom
Tel: +44(0) 1327 301000: Fax: +44(0) 1327 706555: Website: www.hi-force.com
2)
To advance the cylinder, turn the
release knob clockwise. Operate
pump handle. The pump will
automatically switch from low pressure
(high flow) operation to high pressure
(low flow) as the pressure increases.
See Figure 1. (HP232 used in diagrams).
Note: The cylinder will automatically be held in
the advance position and will not retract of its
own accord.
3)
To retract the cylinder turn the release
knob anti-clockwise slowly, ensuring
that the cylinder does not retract too
fast as to make the operation unsafe.
See Figure 2. below
4)
If the pump is to be transported after
use, always re-fit the transit plug in the
tank.
WARNING: DO NOT RELY ON THE PUMP VALVE
FOR POSITIVE LOAD HOLDING. IF IT IS REQUIRED
TO LOCK THE LOAD IN POSITION USE A MANUAL
SHUT OFF VALVE IN THE CIRCUIT. NEVER WORK
UNDER A LOAD SUPPORTED ONLY BY HYDRAULIC
MEANS.
FILLING WITH OIL
Ensure cylinder is full retracted.
HP211/HP212/ HP232/ HP252: Position pump
horizontal on a flat surface remove plug on the
top of the tank and check oil level with dipstick
on plug.
Use only
Hi-Force HF032 or HFO46
oil only.
BLEEDING THE HYDRAULIC SYSTEM
Connect a cylinder to the pump. Position the
cylinder below the level of the pump with its
pressure ports uppermost. Ensure the bleed
screw on the pump is open. Operate the
cylinder 3-4 times over its full stroke and all air
should be forced back to the pump reservoir.
Warning
: when using a small cylinder with long
hoses it is possible that air can remain trapped
in the hose if the volume of the hose is greater
than the volume of the cylinder. In this case the
bleeding must be carried out using a shorter
hose before use.
See Figure 3. Below;
Figure 3:
