L4383.
.
7
9. Adjust air regulator valve until the required stall
pressure on “high pressure” gauge is reached.
10. CLOSE the on/off (air flow) valve in to the
VERTICAL position
11. SLOWLY open the return to tank valve
6.0 SERVICING THE HYDRAULIC PUMP UNIT
Hydraulic equipment must only be serviced by a
qualified hydraulic technician. For repair service, contact
the Enerpac Authorized Service Centre in your area.
7.0 SERVICING INSTRUCTIONS
Refer to the RPS for Enerpac Air Pump D3001A0115AA
for part numbers {item #} and cross section {figure #}
of the pump.
7.1 To Disassemble the Motor
1. Remove the eight 5/16” bolts assemblies {items
1, 19, 22, 24; figure 5} that clamp the Air Cylinder
{item 3; figure 5} between the head Casting {item
12; figure 5} and the Air Cylinder End {item 2;
figure 5}. Remove the Head by tapping on a fitting
screwed into either the “AIR IN” or “AIR OUT” ports
with a soft hammer.
2. Remove the Retaining Ring {item 21; figure 5}
from the bottom of the Air Piston {item 4; figure 5}
and remove the Hydraulic Piston. The Pilot Valve
Assembly {item 13; figure 5} may then be pushed
out through the bottom of the Air Piston.
3. Remove the Retaining Ring {Item 18; figure 5} from
the Head assembly. Remove the Bearing Assembly
{item 7; figure 5} by lifting or prying it out with a
hammer handle or similar tool. The Air Piston
Actuating Valve, (part of item 9; figure 5, Valve
Assembly) may also be removed at this time. The
Bearing Assembly has a moulded rubber seat and
should be replaced if worn or damaged. The “O”
Ring {item 20; figure 5} in the Bearing Assembly,
the “O” Ring {item 16; figure 5} in the upper part
of the Air Piston Actuating Valve, and the “O”
Ring * on the Pilot Valve Assembly Head should
be replaced as a routing matter while the pump is
disassembled as they are especially important for
maximum performance.
4. The Head has a Rubber Bumper {item 15; figure 5}
inserted in the upper portion of the body. This acts
as an air seal and also a cushion for the Air Piston
Actuating Valve. If worn or damaged it should be
replaced
When worn or damaged the Air Piston Actuating
Valve and the Sleeve in which it operates are supplied as
a Valve Assembly, {item 9; figure 5}. The sleeve may be
removed from the Head Casting by means of an internal
puller engaging the slots in the sleeve. Install a new set
of “O” Rings {included as part of recommended seals
spare kit D3001A0100SK} (4 required and included
with Valve Assembly when ordering as a replacement
part). Also coat the “O” Rings and the Sleeve O.D. with
Petroleum Jelly or other suitable lubricant to avoid
possibility of damage to the “O” Rings when installing
the new Sleeve.
DO NOT remove the sleeve from the Head
Casting unless replacement is to be made. The Valve
Assembly is precision ground and honed to very close
tolerances and the Sleeve may be damaged when
removed from the Head Casting.
NOTICE
CAUTION
