BRP Johnson J30TEL4SUA 2007 Service Manual page 236

POWER TRIM AND TILT
PTT MOTOR
Inspect the surface of the commutator. If the sur-
face is gummy or dirty, clean the surface with 400
grit emery paper.
Use vernier calipers to measure the outside diam-
eter of the commutator.
Commutator Outside Diameter
Standard
Service limit
If the measurement exceeds the service limit,
replace the armature.
Make sure that the mica (insulator) between the
segments is undercut to the correct depth.
Commutator Undercut
Standard
Service limit
1
2
1. Segment
2. Mica
3. Undercut
WARNING
To avoid personal injury, wear eye protec-
tion and set compressed air pressure to
less than 25 psi (172 kPa).
234
0.77 in. (19.5 mm)
0.73 in. (18.5 mm)
001926
0.05 to 0.06 in.
(1.3 to 1.6 mm)
0.02 in. (0.5 mm)
3
001714
If the undercut is less than the service limit, cut
the mica to the specified depth. Use compressed
air to remove all particles of mica and metal.
Brushes
Use vernier calipers to check the length of each
brush.
Brush Length
Standard
Service limit
If the brushes are worn down to the service limit,
replace the brushes.
O-ring
Inspect the O-ring between the PTT motor and the
pump. If there are any cuts, nicks, or tears,
replace the O-ring.
0.39 in. (9.8 mm)
0.19 in. (4.8 mm)
001927
001928