Buyers P45AC6 User Manual

Quality since 1946

Rebuild Instructions

P45AC6

Air Compensated Pintle Hook

Use with replacement part kits: C6200, C6300, & C6400

9049 Tyler Blvd. • Mentor, Ohio 44060

Phone [phone] • Fax [phone]

Toll-Free Fax [phone] • buyersproducts.com

ITEM NO. PART NO. DESCRIPTI ON C6200 C6300 C6400

1 - Body Casting - - ­ 2 C4002 Plunger Arm 1 - 1
3 C6003 Lock - 1 1
4 C6004 Jaw 1 - 1
5 C6005 Shaft 2 - 2
6 C6006 Torsion Spring 1 1 1
7 C6007 Compression Spring 1 - 1
8 C6008 Actuator - - 1
9 C6009 Set Screw - 1 1
10 C6010 Roll Pin 1 1 1
11 C6011 Retaining (Snap) Ring 2 - 2
12 C6012 Grooved Pin (Rivet) 2 - 2

B. Pivot Shaft Inspections

1. Verify that the Shafts (5), Snap Rings (11), and

Grooved Pin Rivets (12) are in place and secure.
See Fig. 1 on pg. 2 for proper location of Snap Rings.

INSPECTION

A. Body Inspection

1. Visually inspect the pintle hook Body Casting

(1) for signs of excessive wear, or fatigue such as
deformation or cracks. If any such conditions are
noted, the entire hook should be replaced. (This is
a good time to check the mounting structure, bolts,
and air chamber. Contact vehicle manufacturer for
guidelines.)

C. Jaw Inspection

1. Place a properly matched lunette eye on the

hook, lower the Jaw (4) and apply operating pres­sure to the air chamber.

2. With the Lock disengaged, as shown in Fig. 2 on
pg. 2, lift the Jaw (4) until it stops. The secondary

interlock feature must prevent the Jaw from open­ing more that 1/2” above the horn.

–continued

Quality since 1946

Fig. 1

3. If the space exceeds 1/2”, replace the Jaw and
Plunger Arm using replacement Jaw Kit C6200 of
the Rebuild Kit C6400.

D. Lock Inspection

1. Grasp the Lock Actuator (8) and without com-

pressing the Spring (6) rotate the Actuator handle
to lift the Lock (3) until it stops against the Body
undercut (A). The “tooth” if the Lock must not
clear the stop (B) on top of the Jaw (4). If the lock
clears the stop (B) as shown in Fig.3:
a. Inspect the undercut (A) on the Body, if the
undercut is not clean and square the entire hook
should be replaced.
b. If the under cut is in good condition, then install
a new Lock Kit C6300 or Rebuild Kit C6400.

E. Full Rebuild

If inspection steps A-D indicate that both the Lock
and Jaw mechanisms require replacement, then
the Rebuild Kit C6400 should be used.

JAW KIT C6200

In order to perfrom this repair, it will be necessary
to remove the hook from the vehicle.

Fig. 2

A. Disassembly

1. Remove the Roll Pin (10) from the Actuator (8),

loosen the Set Screw (9) and pull the Actuator (8)
out of the assembly. This will release the Lock (3)
and the Torsion Spring (6) from the assembly.

2

Fig. 3

Quality since 1946

2. Remove the Shafts (5) that secure the Jaw (4)
and Plunger Arm (2) by removing the head of the
Rivets (12) using a cold chisel or by grinding (eye
protection is required.) Then remove the Retaining
Rings (11) with the proper snap ring tool. Com­plete the disassembly by inserting a pin through
the rivet holes in the Body and driving out the
old Shafts.

3. Clean and inspect the Body for any damage,
which may not have been detected during initial
inspection.

4. Clean the snap ring grooves and verify that they
have not been crushed or broken through. If the
snap ring grooves are damaged the entire hook
must be replaced.

B. Plunger Arm Installation

1. Apply a liberal amount of a good grease inside

the shaft hole in the new Plunger Arm (2). Holding
the new Plunger Arm in the position illustrated by
Fig. 4, insert it through the opening in the back
(mounting face) of the Body until it stops against
the horn of the hook.

2. Rotate the Plunger Arm 90° to allow the pivot
end to move down into position to align with the
lower holes in the Body.

3. Insert new Compression Spring (7) into the re­cess in the Body and onto the post on the Plunger
Arm, and insert the new Shaft (5). The end of the
Shaft that has a hole for the Rivet is inserted first.
Do not install the new Snap Ring or Rivet at this
time.

C. Jaw Kit Installation

1. Apply a liberal amount of a good grease inside

the shaft hole in the Jaw (4). Place the Jaw into po­sition in the Body and insert the new Shaft (5). Do
not install the Snap Ring at this time.

2. Place a lunette eye of the proper size onto the
hook. With the Jaw resting on the top of the horn,
verify that the Air Chamber will be able to push
the Plunger Arm against the eye.

3. If interference of the Jaw and Plunger Arm will
not allow the Plunger to contact the eye, remove

Fig. 4

the Jaw and inspect for any burrs and carefully
file or grind to allow free movement. Care should
be taken not to remove an excessive amount of
material. Reinstall the Jaw and repeat step 2.

4. With the lunette eye in place and the Plunger
held against the eye, verify that the Jaw will not
lift more than 1/2” above the horn as in inspection
step C2.

D. Lock Installation

1. Reassemble the Lock mechanism as described

below in the Lock Kit C6300 section.

E. Secure the Pivot Shafts

1. Install the Rivets by providing a back stop

against the end of the Shafts on the snap ring side
of the hook and driving the Rivets (12) into the
holes provided in the end of the Shafts (eye protec­tion required.) DO NOT USE THE SNAP RING TO
BACK-UP THE RIVETING.

2. Install the Snap Rings (11) and inspect as shown
in Fig.1.

–continued

2

Quality since 1946

9049 Tyler Blvd. • Mentor, Ohio 44060

Phone [phone] • Fax [phone]

Toll-Free Fax [phone] • buyersproducts.com

LOCK KIT C6300

A. Disassembly

1. Remove the Roll Pin (10) from the Actuator (8),

loosen the Set Screw (9) and pull the Actuator out
of the assembly. This will release the Lock (3) and
the Torsion Spring (6) from the assembly.

B. Lock Installation

1. Install the new Torsion Spring (6) onto the

Actuator so that the left end will rest on the shelf
provided in Body and the right end will insert into
the small hole at the back of the Lock.

2. Take note of the location of the flat area on the
Actuator shaft. Insert the Actuator through the
Lock and the right side hole in the Body. Tighten
the Set Screw (9) against the flat area on the Ac­tuator.

3. Install the Roll Pin (10) through the hole in the
end of the Actuator.

FULL REBUILD KIT C6400

The Rebuild Kit contains all parts required to
rebuild the P45AC6 Pintle Hook Assembly. The
rebuild procedure is to follow the instructions to:

1. Replace the Jaw and Plunger Arm per Instruc­tions for Kit C6200; then

2. Replace the Lock per the instructions for
Kit C6300.

3003921 Rev. A