JLG G12-55A Service Manual - Manual (Page 57)

3-23 G10-55A, G12-55A
Boom
3.9 QUICK SWITCH ASSEMBLY
3.9.1 Quick Switch Removal
Before S/N 0160037689
1. Remove the lock bolt (1) holding the tilt cylinder rod
end pin (2) to the quick switch assembly (3).
Remove the Tilt Cylinder pin.
2. Support the quick switch assembly (3).Remove the
capscrew (4) and locknut (5) securing the head pin
(6) to the boom head (7).
3. Inspect the above pins for nicks or surface corrosion.
Use fine emery cloth to fix minor nicks or corrosion.
If damaged or if it cannot be repaired the pin must be
replaced.
3.9.2 Quick Switch Installation
1. Assemble the quick switch assembly (3) to the boom
head (7). Line up the quick switch between the
mounts on the boom head. The quick switch should
be centered in the boom head.
2. Coat the quick switch head pin (6) with an anti-seize
compound. Insert the quick switch head pin through
the quick switch and boom head. Secure with the
previous capscrew (4) and locknut (5).
3. Align the quick switch with the tilt cylinder rod end
and insert the tilt cylinder pin (2). Align the tilt
cylinder pin and screw in the locking bolt (1). Torque
as required.
3.9.3 Quick Switch Removal
S/N 0160037689 & After
1. Remove the lock bolt (8) holding the tilt cylinder rod
end pin (9) to the quick switch assembly (10).
Remove the Tilt Cylinder pin.
2. Support the quick switch assembly (10).Remove the
capscrew (11) and locknut (12) securing the head
pin (13) to the boom head (14).
3. Inspect the above pins for nicks or surface corrosion.
Use fine emery cloth to fix minor nicks or corrosion.
If damaged or if it cannot be repaired the pin must be
replaced.
3.9.4 Quick Switch Installation
1. Assemble the quick switch assembly (10) to the
boom head (14). Line up the quick switch between
the mounts on the boom head. The quick switch
should be centered in the boom head.
2. Coat the quick switch head pin (13) with an anti-
seize compound. Insert the quick switch head pin
through the quick switch and boom head. Secure
with the previous capscrew (11) and locknut (12).
3. Align the quick switch with the tilt cylinder rod end
and insert the tilt cylinder pin (9). Align the tilt
cylinder pin and screw in the locking bolt (8). Torque
as required.
MY5080
6
5
3
4
1
2
7
MY5090
13
12
10
11
8
9
14