MOUNT-RUBBER 3686660 - Caterpillar

(2) Put FT1526 Fixture (4) in a vise as shown, and put governor housing (2) on fixture (4). Use four of the governor housing bolts to fasten governor housing (2) to fixture (4), but tighten the bolts with the fingers only. (3) Loosen the two bolts (5) and install FT1525 Alignment Pin (6) through liner (7), and into both bores for the governor control shaft, in governor housing (2). The small diameter of alignment pin (6) fits in the inside bore for the control shaft, while the large diameter fits in the seal bore. (4) When alignment pin (6) is all the way in liner (7) and fully engaged with both bores in governor housing (2), tighten bolts (5) and then tighten the four bolts that fasten governor housing (2) to the base of fixture (4). After all bolts are tight, be sure the alignment pin turns freely, then remove the alignment pin. (5) Install drill bushing (8). Use a 1/2" electric drill with core drill (9) to make outer bore (A) to a larger size of 18.26Ø (.719"Ø). (6) After outer bore (A) has been made to the larger size of 18.26Ø (.719"Ø), move the drill inward (forward) until the cutting end of core drill (9) comes into contact with the inner bore for the governor control shaft. Measure 12.7 (.50") from face (B) and put a mark at that specific location on the core drill. [In the illustration above, tape (C) has been put around the core drill to mark the 12.7 (.50") location.] (7) Drill the inner bore for the governor control shaft to the depth of tape (C) [12.7 (.50") mark] that was put on core drill (9), in step 6 above. Remove core drill (9) and drill bushing (8). (8) Install reamer bushing (10). Use reamer (11) with the electric drill to ream both the outer bore, and the inner bore for the governor control shaft to 18.82Ø .013 (.741"Ø .0005"). Use a mixture of one-half kerosene and one-half clean 30W motor oil for lubrication of reamer (11). Feed (push in) the reamer slowly and smoothly through outer bore (A) and then into the inner bore. The feed, speed and lubrication used during the reaming procedure will all have an effect on the finish size of the bore. (9) After both the outer bore and the inner bore have been reamed to the correct size, remove governor housing (2) from the fixture; clean all metal chips from both bores, and especially clean fuel bypass drain hole (D) and its passage.(10) See INSTALLATION OF 8N3945 BUSHING at the rear of this instruction for installation procedure.Installation Of An Inner Bearing For The Governor Control Shaft (Governor Housings That Have An Outer Bearing)
The information that follows is for those early model governor housings that have been reconditioned once, and have a bearing installed in the outer bore for the governor control shaft, or, for later governor housings that are equipped new with a