16-3. TANDEM GEAR PUMP REPAIR (CONT)
Do not grip on or near any machined
surfaces during disassembly or
assembly. Failure to follow this
precaution will cause part damage.
Wipe all sealing surfaces clean and
dry. Apply film of clean hydraulic oil
to all seals as they are installed.
Install parts (18 and 31 through 34)
in end cover (30).
Install four studs (18) in end
If removed, install plate (34) and
two screws (33) on end cover (30).
Place end cover (30) in a vise with
mounting face down.
If removed, install plug (32) in end cover (30). Stake each plug with a punch at both ends of
screwdriver slot and around edges. Peen edge of hole 1/32 to 1/16 inch with a 1-1/2 inch steel
Apply sealant on lip of seal (31). With metal side of seal up, use an arbor press and a bar
(1-3/4 in. [44.5 mm] diameter by 2 in. [50.8 mm] long bar), press seal into end cover (30). Press
seal flush with recess. Wipe off excess sealant.
Install gear housing (19) and parts (21, 23, and 25 through 28) on end cover (30).
If removed, install dowel pins (29) in gear housing (19) or end cover (20).
Apply grease on two seals (26). Install seals into grooves on gear housing (19).
If parts are difficult to fit during assembly, tap gently with a soft hammer. Use care to
prevent part damage.
Ensure that dowel pins (29) are in place. Install gear housing (19) on end cover (30). Gently
tap gear housing tight against end cover use care to prevent damage to seals (26).