Upright ab62, Service And Parts Manual

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3-20 AB62 Work Platform - European
M
AINTENANCE
Section
3.12
Figure 3-22: Jib Cylinder (S/N 1111 - Current)
3.12 S
ETTING
B
ACKLASH ON
R
OTATIONAL
G
EAR
Backlash is the shortest distance between tooth sur-
faces of adjacent teeth in mating gears.
1. Position boom directly over center of rear axle
(standard forward driving position).
2. Loosen the grearbox mounting bolts just enough
to allow the gearbox to be adjusted in and out.
3. Turn adjusting screws in until gearbox teeth make
contact with bearing teeth and adjusting screws
become snug.
4. Unscrew adjusting screws five turns. Do not
move the gearbox.
5. Place the magnetic indicator base on the bottom
of the turret assembly. Set the dial indicator probe
on the gearbox pinion straight across from the
bearing (Figure 3-24) and adjust the dial to
ZERO.
6. Move the gearbox away from the bearing until the
indicator shows the correct amount of backlash
(.007”-.009”).
7. Carefully torque the gearbox mounting bolts while
watching the indicator to make sure the correct
backlash is maintained.
8. Snug the adjusting bolts against the gearbox and
tighten the jamb nuts.
Figure 3-23: Setting Rotational Gear Backlash (Viewed from bottom of turret)
Seal Kit 104257-011 (S/N 1100-1110)
Seal Kit 104257-010 (S/N 1111-Current) includes:
1. O-Ring
2. Rod Wiper
3. Seal
4. Wear Ring
5. Back-up Ring
6. O-Ring
7. Cast Iron Ring
8. Wear Ring
9. Seal
A. Rod
B. Head
C. Piston
D. Nut
E. Cylinder
F. Relief Valve
G. Counterbalance Valve
NOTE: Torque Locknut “D” to 237 - 271 Nm (175-200 ft. lbs.)
DIAL INDICATOR
MOUNTING PLATE
GEARBOX PINION
ROTATION BEARING