Pro Series 51016 51 Receiver - Manual (Page 2)

Part Numbers:
51016
Crossmember
and rivets
Chevrolet & GMC Pickup Trucks with 34" frames
(Does not fit units with 6' bed or 4WD with heavy duty suspension )
Rev. A 6-27-06 N51016 Sheet 2 of 5 z 2001, 2006 Cequent Towing Products
Lock Washer 1/2 Qty. (2) Spacer 1/4 X 1.50 X 2.00 Qty. (12) 5
Bolt 1/2-13 X 2.25 Qty. (2) Conical Washer ½ Qty. (6) 6
Hex Nut 1/2-13 Qty. (6) 7
Nut M12 X 1.75 Qty. (2) Bolt 1/2-13 X 2.00 Qty. (4) 4
Spacer 7/16 X 1.00 X 2.00 Qty. (2) Flanged Locknut 1/2-20 Qty. (6) 3
Bolt M12 X 1.75 X 45 Qty. (2) 9 Harden Flat Washer Qty. (8) 2
Spacer 1/4 X 1.00 X 2.00 Qty. (4) 8 Bolt 1/2-20 X 1.50 Qty. (6) 1
Note: check hitch frequently, making sure all fasteners and ball are properly tightened. If hitch is removed, plug all holes in trunk pan or other body panels to
prevent entry of water and exhaust fumes. A hitch or ball which has been damaged should be removed and replaced. Observe safety precautions when working
beneath a vehicle and wear eye protection. Do not cut access or attachment holes with a torch.
This product complies with safety specifications and requirements for connecting devices and towing systems of the state of New York, V.E.S.C. Regulation V-5
and SAE J684.
12
13
11
1. Tighten the 1/2-20 hex bolts installed as shown
on page 1 to 90 lb.-Ft. (122 N*M)
2. Note: 1981 and later Chevrolet & GMC applications
with step bumpers require the removal of support
brackets to the frame. These brackets must be
retained for reinstallation upon removal of the receiver.
The step bumper should not be used for towing with
these support brackets removed.
3. Position and center the receiver assembly on vehicle
frame. Rearmost slot in receiver should not be located
closer than 3/4" from the end of the frame. To clear
rivets in the frame, place a spacer between side brackets
and vehicle frame at each attachment. Clamp receiver
to the frame. Note: On some units even with the spacers
in place, the top of the rivets may have to be ground or
filed off to ensure that the attaching surfaces sit flat on the frame.
4. Using the slots in the side brackets as templates, center punch
and drill six (6) 1/2" diameter holes. See General Notes regarding
the use of existing holes.
5.Install fasteners in each side as shown.
Note: On units equipped with an extended cab and 6' bed, the
spare tire will have to be relocated elsewhere on the vehicle.
1. On 6' bed units, remove and relocate ground wire and ground
wire bolt located on driver's side frame rail.
2. If vehicle is equipped with factory installed step bumper,
remove the M12 hex bolts from each end of the frame and discard.
3. Raise receiver into position, centering rearmost slot over existing
holes in frame. On units with a 6' bed, the large 1" x 2" slot will be
positioned over a bolt on the passenger's side and a rivet on the driver's side.
4. Vehicles w/factory installed step bumper: Install M12 x 1.75 x 45mm hex
bolt and conical washer through side bracket into frame, threading into
existing weldnut as shown.
5. Vehicles W/O factory installed step bumper:
Install M12 x 1.75 x 45mm hex bolt and conical washer through side
bracket and frame and fasten with block, lock washer and M12 x 1.75 nut.
6. Center receiver crosstube assembly on vehicle and tighten the 1/2-20
hex bolts installed as shown on page 1 to 90 lb.-Ft.(122 N*M).
7. Due to vehicle variation, center attachment hole in frame may have to be
enlarged to 1/2". See General Notes regarding use of existing holes.
8. Install fasteners in center and forward holes on each side as shown.
1988 & Later Model Chevrolet & GMC Pickup Trucks with 37-1/2" frames
4
Spacers required to space
receiver down to clear rivets.
Top of rivets may have to be
filed to ensure spacers sit
flat to frame and receiver.
8
9
2
4
5
4
5
8
6
7
6
5
5
5
Existing hole.
Rivets
Crossmember
and rivets
Existing weldnut
for units with
factory installed
step bumpers
Without Bumper
use:
With Bumper
use
4
5
5
12
11
6
7
6
7 6
9
Tighten all 1/2-20 GR5 fasteners with torque wrench to 90 Lb.-Ft. (122 N*M)
Tighten all 1/2-13 GR5 fasteners with torque wrench to 75 Lb.-Ft. (102 N*M)
Tighten all M12 CL10.9 fasteners with torque wrench to 75 Lb.-Ft. (102 N*M)
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Form: F205 Rev A 5-6-05