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6.4 Motor Brush Replacement
To prevent motor damage, the ZU4 motor brushes incorporate an
automatic motor stop when one of the brush carbons wears to a
length of 0.25" [6 mm]. Inspect both brushes.
1.
Disconnect pump from electrical power.
DANGER: To avoid possible electrocution, pump
must be completely disconnected from electrical
power before brush servicing is attempted.
2.
Remove both brush caps (A) by defl ecting the brush cap
latch (B) and gently prying outward (see Figure 14).
3.
Remove motor brushes by turning black cap counter-
clockwise.
4.
Replace both brushes and reverse procedure to reassemble.
brush cap
B
latch
Figure 14, Brush Cap Removal
7.0 TROUBLESHOOTING (SEE TROUBLESHOOTING
GUIDE)
Only qualifi ed hydraulic technicians should service the pump or
system components. A system failure may or may not be the result
of a pump malfunction. To determine the cause of the problem, the
complete system must be included in any diagnostic procedure.
The following information is intended to be used only as an aid in
determining if a problem exists. For repair service, contact your
local Authorized Enerpac Service Center.
A
brush cap
6
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