Tightening Gang Bolt

causym CAUTION: Blades are sharp and can cut causing serious injury to you or others. Lock gang so it will not roll when force is applied. Block disk blades and install square offset wrench on nut spacer casting. Brace handle against floor or ground.

IMPORTANT: Before assembly, wire brush spools and center of disk blades to remove all dirt, grit, rust or paint. There must be metal-to-metal contact between spools and disk blades for correct gang tightness.

1. Attach 1.2 m (4 ft) pipe (C) to square offset wrench (A) and place wrench on nut spacer casting (B).


A-Square Offset Wrench
B-Nut Spacer Casting
C-1.2 m (4 ft) Pipe

N52089
N52189

KB78086,000035A -19-10JUL07-1/2

2. Attach a 1.8 m (6 ft) pipe (A) to hex offset wrench (B) and place wrench on hex nut (C).

NOTE: For more consistent torque, apply oil to threads before tightening.

3. Tighten inner nut to specification.

Specification

Nut -Torque 881 N·m (650 lb ft)

NOTE: Illustration shows preliminary tightening; not final tightening when force is applied at end of handle.

4. Tighten jam nut to specification.

Specification

Jam Nut -Torque 881 N·m (650 lb ft)

5. Verify disk gang vertical run-out specification.

Specification

Run-Out -Length 12.7 mm (1/2 in.)

    Disk Gang Vertical Run-Out Criteria

  • If vertical run-out is 12.7 mm (1/2 in.) or less, disk gang is ok.
  • If vertical run-out is more than 12.7 mm (1/2 in.) disk gang has one of the following problems:
    • Bent gang bolt. Replace.
    • Spools and disk blades do not have good metal-to-metal contact because of rust or other foreign material lodged between spool and blade. Clean or replace spools as needed.
    • Gang bearing hardware not tightened properly. Loosen all hardware, spin gang so bearings line up, then tighten up evenly across gang.

      IMPORTANT: Verify disk gang bearing holes are aligned with flangette holes or damage to disk gang could occur.

N52172


A-1.8 m (6 ft) Pipe
B-Hex Offset Wrench
C-Hex Nut

KB78086,000035A -19-10JUL07-2/2