Disassembly - Eaton Heavy Duty 2 Series Manual

Disassembly

Control Subassembly Removal
1. Remove the control valve. If your pump has a
manual control, solenoid activated control, or
hydraulic remote control, proceed to step 3. If your
pump has an optional Electronic Proportional (EP)
control, follow steps 4 through 8.
2. Remove the five retaining cap screws using a 1/4
in. bit socket or hex key. Remove the control sub-
assembly by lifting it straight up. Go to step 9.
CAUTION: Handle electronic
equipment with care.
The following repair information may
be used in the inspection, conversion
and repair of the Eaton Series 2
Heavy-Duty Variable Displacement
Pump. The manual displacement
control, electronic proportional (EP)
control, high pressure relief valves,
pressure override valves and the
auxiliary pump options are covered.
These procedures cover the basic series
2 pump. The Eaton Series 2 is available
in two frame sizes with various displace-
ments and options. The procedures for
the pumps with options that are not
shown are basically the same.
Work in a clean area, as the level of
cleanliness maintained when repairing
the pump may affect pump
3. For pumps with an
optional EP control,
disconnect all power
to the input device.
Release the latches
and disconnect the
connectors between
the electronics module
and the command
input device.
EATON Heavy-Duty Series 2 Hydrostatic Pumps Parts and Repair E-PUPI-TS004-E October 2004
performance. After washing the parts
with clean solvent, blow the parts dry
with air. Inspect all mating surfaces.
Replace all damaged parts. Do not use
grit paper, files or grinders on finished
parts.
Whenever a pump is disassembled, it is
preferable to replace all seals. Lubricate
new seals with petroleum jelly before
installation. Use only clean,
recommended hydraulic fluid on
finished surfaces before reassembly.
Thoroughly clean the exterior of the
pump before disassembly. Make sure all
open ports are sealed.
CAUTION: Disconnect or disable all
electrical or mechanical
power to the pump
before beginning work.
4. Using a 1/8" bit socket
or hex key, remove
the three button head
cap screws and lock -
washers. Carefully lift
the electronic module
off the control.
5. Unlatch and
disconnect the
connector between
the electronic module
and the solenoid coils.
6. Using a 1/4" hex key
or 1/2" socket/end
wrench, remove the
five hex head cap
screws.
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