For Driveshaft Mounted (D suffix) part numbers:
Step 1. Clean and measure the mounting area diameter using deep-jaw calipers, a diameter tape measure (Stanley p/n 33-115 works well) or measure the circumference and divide by Pi (3.1417).
Step 2. Using a straight-edge & marker, draw a straight line from the u-joint grease fitting(s), up the driveshaft long enough to be visible when the cover is mounted. This line will be later be used to drill an access hole to service the u-joint (see below).
Step 3. Select the corresponding packet of 4 mounting-pads, the interchangeable pads are numbered to match the driveline diameters covered in the kit. Example: 4590PD fits 4.590” diameter.
Step 4. Affix the 4 mounting pads over the 2 attachment bars in each of the cover halves.
Step 5. Place the cover halves over the drive line, rotate as needed to accommodate balancing weights. Properly align the 2 halves using the "Post & Hole" locating feature before tightening
Step 6. Using a 4mm hex (Allen) driver, tighten the 12ea. M5 x 0.8 captive socket head screws. Do not overtighten, simply snug the fasteners as you would on any other lightweight cover.
* When installed properly, the cover will flex but not move on the mounting surface. Test for firm mounting by tugging on the open bell, if movement is visible at the mount area, switch-out 2 opposing pads (for balance) with pads marked for the next smaller diameter.
To access grease fittings facing driveshaft with cover in-place
Step 1. Using the mark from Step 2 above, visually align and mark a spot on the cover above and in-line with the zerk, on the sloping section of the cover.
Step 2. Using a 5/8” (15.75mm) diameter drill bit on slow speed, drill an access hole on the marked spot. *Flat bladed wood bits work best.
Step 3. Place the provided 5/8” diameter plug(s) into the access hole(s) in the cover.
