ZF Repair Manual: ZF63A, ZF63, ZF80A, ZF80-1A

6. HOUSING

6.1 Transmission housing halves

Using an adequate drift punch, top the locating pins

(item 1, Fig. 6-1a and 6-1b) out of the housing.

Loosen and remove all hex head bolts and lock washers

(item 2 and 3, Fig. 6-1b). Using a plastic hammer slightly

top the split line of the case halves to break the seal.

Then remove the input side of the housing.

FIG. 6-1a

FIG. 6-1b

6.2 Shafts and gears

Take the gear set out of the housing

Intermediate shaft (item 2, Fig. 6-2).

Input shaft (item 1, Fig. 6-2).

Output shaft (item 3, Fig. 6-2).

Check all gears, bearings and three piston rings on the

input shaft (item 4, Fig. 6-2) for signs of wear or failure.

If any of the gears are damaged or showing signs of ex-

cessive wear ZF HURTH MARINE recommends repla-

cing the complete gear set.

When tapered roller bearings on the input shaft need to

be replaced, the butting rings and needle bearings

should also be replaced. To check for correct clutch op-

eration, rotate the gears on the input shaft. If it is hard to

turn the gears, the clutch is probably damaged.

FIG. 6-2

6.3 Radial shaft seals

Input shaft seal

Using a seal mandrel inside the housing top the input

shaft seal out.

Discard seal and replace with a new one. (Fig. 6-3a).

FIG. 6-3a

Repair Manual and Spare Parts List

Section 3: Disassembly