Commutator; View Of Steer Motor Commutator; Terminal Nuts - Toyota 7BPUE15 Service Manual

Section 7. Component Procedures
Motors (General)

Commutator

Figure 7-50. View of Steer Motor Commutator
The commutator should be inspected for
surface condition and high mica.
The commutator must be smooth and clean to
provide maximum brush wear. When
commutators are not properly maintained,
carbon dust can collect in the grooves between
the segments. This can lead to
the armature.
Good commutation will be indicated by a
dark-brown, polished commutator and an
evenly polished brush wearing surface.
If the commutator appears rough, pitted, or has
signs of burning or heavy arcing between the
commutator bars, the motor should be removed
for servicing.

Terminal Nuts

Whenever you disconnect and reconnect any
power leads to a motor, always tighten the
motor cable securing nuts with a torque wrench
to prevent over-tightening them and damaging
the motor. Use a second wrench on the stud
Toyota Orderpicker Model 7BPUE 15 Service Manual
terminal securing nut to avoid twisting the
stud.
Motor Cable
Securing Nut
Securing
Nut
Figure 7-5 1 . Motor Terminal
Stud terminal securing nuts should be torqued
to 140-160 in. lbs. (15.8-18.1 Nm) and motor
cable securing nuts to 100- 120 in. lbs.
(1 1.2- 13.6 Nm). Check these torques each time
you check motor brushes.
Two different methods are used to connect
power leads on this truck. The double nut
a short circuit in
method is shown in Figure 7-5 1. The triple nut
method is shown in Figure 7-52. The torques
listed in the paragraph above apply to both
methods.
Figure 7 -52. Motor Terminal
Motor Cable
\
Securing Nut
1 o r 2
Stud
Terminal
Securing
Nut
00700-CL222-05, 1 5 March 2005
Electrical Components
Fiber
Double Nut
Terminal Stud
Cable Lug
I Washer
Housing
Triple Nut