User Manual

ManualsBrandsJLG ManualsSpecial machinery723A Service Manual

3-9

L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7

Boom

Boom Section Wear Pad Pathway Lubrication:

• Clean and lightly grease all wear pad pathways with

Mystik Tetrimoly grease.

• Clean and lightly grease the hose carrier guide bar

pathways with Mystik Tetrimoly grease.

3.6 QUICK ATTACH ASSEMBLY

3.6.1 Quick Attach Removal

1. Park the machine on a firm, level surface. Place the

transmission control lever in (N) NEUTRAL, engage

the park brake switch.

2. Place a Do Not Operate Tag on both the ignition key

switch and the steering wheel, stating that the

machine should not be operated.

3. Open the engine cover. Allow the system fluids to

cool.

4. Properly disconnect the battery.

5. If equipped with a hydraulic quick attach device,

remove both hydraulic hoses (6) from the valve on

the left side of the boom head. Plug and cap the

hose ends to prevent dirt and debris from entering

the hy draulic system.

6. Remove the lock bolt holding the tilt cylinder rod end

pin (7) to the quick att ach as sembl y ( 8). Remove t he

tilt cylinder pin (7).

7. S upp or t the quic k atta ch assembly (8). Remove the

lock bolt holding the quick attach pin (9) to the quick

attach assembly. Remove the pin from the quick

attach assembly from either side.

8. Inspect the above pin 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.

3.6.2 Quick Attach Installation

1. Line up the quick attach between the mounts on the

boom head. The quick attach should be centered in

the boom head.

2. Coat the quick attach pi vot pin (9) with an anti-seize

compound. Insert the quick attach pivot pin through

the quick attach (8) and boom head. Align the pivot

pin and quick attach. Install the lock bolt and torque

to 97 Nm (72 lb-ft).

3. Align t he quick att ach (8) with the tilt cylinder rod end

and insert the tilt cylinder pin (7). Align the tilt

cylinder pin and quick attach. Install the lock bolt and

torque to 97 Nm (72 lb-ft).

4. If equipped, uncap and reconnect the hydraulic

quick attach device hoses (6) to the valve on the left

side of the boom head.

5. Properly connect the battery.

6. Clean up all debris, hydraulic oil, etc., in, on, near

and around the machine.

7. Close and secure the engine cover.

8. Remove the Do Not Operate Tags from both the

ignition key switch and the steering wheel.

MZ3700