JLG 4017RS Service Manual - Manual (Page 53)

3-13 3614RS, 4017RS
Boom
2. Park the machine on a hard, level surface, fully retract
the boom, level the boom assembly, place the
transmission in (N) NEUTRAL, engage the park brake
and shut the engine OFF.
3. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel.
4. Open the engine cover. Allow the system fluids to cool.
5. Properly disconnect the battery.
6. Loosen and remove the rear cover and door assembly
from the rear of the first boom section.
7. Loosen the extend chain lock nut and adjusting nut (1)
from the extend chain at the bottom of the first boom
section.
8. Remove the cotter pin and pin (2) securing the extend
chain to the extend chain clevis. Fasten a rope/wire to
the end of the clevis to aid in reinstallation.
Note: Removal of the retract chain from the rear of the third
boom section may be required to access the extend chain clevis
assembly.
9. Loosen and remove the mounting bolt (3) and bracket
(4) securing the extend chain clevis (5).
10. Pull the extend chain from between the second and
third boom sections at the rear of the machine.
11. Unfasten the rope/wire from the extend chain.
3.4.4 Extend Chain Installation
1. Fasten the rope/wire left in the boom from the extend
chain removal to the new extend chain and pull the
chain through the boom sections to the approximate
final position. Remove the rope/wire.
2. Install the extend chain clevis bracket (4) and mounting
bolt (3) to the extend chain clevis at the rear of the third
boom section.
3. Install the pin and cotter pin (2) securing the extend
chain to the extend chain clevis at the front of the boom
assembly.
4. Install the extend chain lock nut and adjusting nut (1) at
the front of the first boom section.
5. Install the rear cover and door assembly to the rear of
the first boom section.
6. Properly connect the battery.
7. Close and secure the engine cover.
8. For chain adjustments see Section 3.7.1, “Chain
Adjustments.”
M 7250 Z
1
2
MZ7190
3
4
5