National Crane 600H, Service Manual

Page: 122 / 232

BOOM 600H SERVICE MANUAL
4-48
08-19-2022 Control # 092-13
12. Retract/Sync Cable Sheave Assembly.
The retract/sync cable sheaves have sealed bearings
and consists of a sheave, bearing, and dust cover. To
assemble the sheave, do the following:
a. Insert the bearing into the sheave.
b. Place one dust cover over the bearing.
c. Slide the retainer into the bearing.
NOTE: Make sure the relief on the sheave and the relief on
the bearing shaft are on opposite sides of the
bearing.
Retract Cable
Anchor Clamp
6
TH
Section
5
TH
Section
Top Rear
Wear Pad
Retract Cable
Stop
1
3
7
8 4
2 6
5
9
10
Clamp Torquing Pattern. Torque to 75 lb-
ft (101.6 N.m)
FIGURE 4-29
6
TH
Section
5
TH
Section
4
TH
Section
Extend Cable
Extend Cable Anchor
4
TH
Section Trunnion
Retract
Cable
Extend Cable Anchor
Inside of 6
TH
Section
Retract Cable Anchor
Front of 4
TH
Section
Extend Cable
Retract Cable Anchor
Outside of 6
TH
Section
Retract Cable Sheave
Inside of 5
TH
Section
Wear Pad Holder
3
RD
Section
Extend Cable Sheave
Front of Telescope
Cylinder
REFERENCE ONLY