Press the fuel pump drive coupling (27) on the drive shaft (31) with the machined end for the sleeve
bearing (80, Figure 6-11) away from the fuel pump drive gear (28, Figure 6-12) until the fuel pump
drive coupling bottoms on the fuel pump drive gear.
Check the cover (11, Figure 6-12) for cracks, and for warped or damaged gasket surfaces. Replace the
cover if it is warped or cracked. Remove minor surface defects from the gasket surfaces with a flat mill
Check the bushings (10 and 45) for wear. If the maximum inside diameter of either bushing exceeds 0.504
inch (12.80 mm), replace it as follows:
Remove the bushing (10 and 45) from the cover (11) using a blind hole bushing puller.
Place the new bushing (10 and 45) on the carrier shaft (7 and 42), and install the bushing by pressing
on the governor carrier (6 and 41) until the shoulder of the bushing is seated against the cover (11).
Check the weight assist spring (3) for free length and tension. Replace the weight assist spring if the free
length is not 0.574 to 0.594 inch (14.58 to 15.09 mm), or if the tension is not within 3.30 to 3.70 pounds
(1.50 to 1.68 kg) when the weight assist spring is compressed to 0.325 inch (8.26 mm).
Check the bushing (35) for wear. If the maximum inside diameter of the bushing exceeds 0.507 inch
(12.88 mm), replace the bushing.
(3) Reassemble. See Figure 6-12.
Install the retaining ring (38) and washer (37) on the idler shaft (36). Slide the bushing (35) on the idler
shaft and press the idler gear (34) onto the idler shaft with the smooth side of the idler gear against the
Ensure that the idler gear (34) to bushing (35) end clearance is 0.002 to 0.007 inch (0.05 to 0.18 mm). If
clearance is insufficient, remove the retaining ring (38) and bushing, and check for an irregular surface on
Heat the cover (11) in the vicinity of the bushing (35) bore with a propane torch.
Press the idler shaft assembly (33) into the cover by applying pressure to the idler gear (34).
Install the sleeve bearing (16) on the tachometer drive shaft (13), and press the tachometer driven gear
(17) onto the tachometer drive shaft until the clearance between the sleeve bearing and the tachometer
driven gear is 0.002 to 0.005 inch (0.05 to 0.13 mm).
Align the oil hole in the sleeve bearing (16) on the tachometer drive assembly (18) with the oil hole in the
cover (i11), and press in the sleeve bearing until the shoulder bottoms on the cover.
Install the tachometer seal spacer (15) with the slotted end down, and install the tachometer seal (14).
Draw the tachometer assembly (18) into the cover (11) by turning in the male connector (12). Tighten the
male connector (12) to 35 to 45 pound-feet (47 to 61 newton-meters).
Install the upper weight carrier assembly (39) in the cover (11), and check the backlash of the idler gear
(34) and governor gear (44) as in step (1) (b), above. Backlash must be between 0.005 and 0.009 inches
(0.13 to 0.23 mm).
Install the pilot of seal driver 3375173 over the drive shaft (31), lubricate a new oil seal (25) with
petrolatum VV-P-236, and, with the lip towards the cover (11), install the oil seal with seal driver 3375173.
Position a new retaining ring (29) between the fuel pump drive gear (28) and ball bearing (30), and press
the drive shaft assembly (26) into the cover (11) until the ball bearing bottoms in the bore.
Using needle nose pliers, install the retaining ring (29) in the groove in the cover (11).
Lubricate another new oil seal (25) with petrolatum VV-P-236, and, with the lip facing away from the cover,
install the oil seal with seal driver 3375173.
Install the tachometer drive gear (24), drive key (32), fuel pump drive coupling (23), and capscrew (20),
lockwasher (21), and washer (22). Tighten the capscrew to 5 pound-feet (7 newton-meters).