T&D Machine Products TFS 302 User Manual

INSTALLATION INSTRUCTIONS
Please follow these instructions to ensure the proper operation of your T & D MACHINE

PRODUCTS Ford/Dart/TFS 302 Rocker Arm Assembly.

1. DETERMINE CORRECT STAND HEIGHT
Install the rocker stands on the cylinder head using the 7/16-14, 12 point attaching bolts. The

stands are marked with the part number on the lower right-hand corner. The stands should be
placed on the head so that the part numbers face the valve stem.

Note:
The Ford production 289/302 heads must have the stud holes drilled and re-tapped with 7/16-14

NC Threads.
Dart 302 heads must have the pushrod holes opened up to provide proper pushrod clearance.
For TFS “R” heads, the pedestals must be machined to provide a flat surface for the stand to sit

on. Tip the head in the ‘Y’ Axis (Short way on the head) until the rocker pad is level. Then cut the
pads equally until they are all cleaned up and same height to the deck surface in the ‘X’ axis. (Long
way on the head)

Remove a rocker arm from one of the shafts and place that shaft on a stand. Take the shaft height
gage supplied with the kit and place it on the valve stem as shown in Figure 1.

The gage should contact the top of the valve and the rocker shaft as shown in Figure 1 for
optimum rocker geometry.

P/N 05850A

If the gage contacts the shaft before touching the top of the valve stem, as shown in Figure 2,
remove a corresponding amount of material from the stud bosses on the cylinder head. This will
lower the rocker stand on the cylinder head

If the gage contacts the top of the valve stem and does not touch the rocker shaft, as shown in
Figure 3, add a corresponding amount of shims between the stand and the cylinder head. This will
raise the rocker stand and shaft to the correct height.

2. DETERMINE CORRECT PUSHROD LENGTH
Place the pushrod length checker into the lifter and install the rocker arm assembly. Be sure the

cam is rotated to the base circle. Seat the bottom of the adjuster screw up against the recess in
the rocker arm and turn the adjuster screw clockwise on full turn down. This is the initial adjuster
position. Adjust the pushrod length tool to the proper length, remove from the engine, and
measure its overall length.

The rocker arm should not be operated with the adjuster screw more than one turn up or down,
from the initial adjuster position. Doing so can cut off the flow of oil to the rocker arm.