8
309887
Pump Service: APS2730H
Repair kits are available. See the
Parts Lists
(page 12). For the best results, use all parts in the kits.
Relieve pressure
, page 4.
NOTES:
D
Metric wrenches needed: 5 mm, 13 mm, 22 mm.
D
Tool Kit 245618 contains tools for removing packing
retainers.
D
Drain and refill pump after 50 hours of operation.
Valves
Order Valve Assembly Kit 245606.
1. Remove hex plug from manifold using a 22 mm
socket.
2. Examine o-ring seated under hex plug. Replace it if
cut or distorted.
3. Remove valve assembly from cavity; the assembly
might come apart.
4. Install new valve, o-ring and hex plug. Torque to 33
ft-lb (45 N
S
m).
NOTE:
Retorque plug after 5 hours of operation.
Pumping Section
1. Remove 8 capscrews and lockwashers from
manifold using a 5 mm wrench.
2. Carefully separate manifold from crankcase.
NOTE:
If stuck, tap manifold lightly with a soft mallet
to loosen it.
CAUTION
To avoid damaging plunger or seals, keep manifold
properly aligned with ceramic plungers when you
remove it.
3. Carefully examine each plunger for any scoring or
cracking, and replace as necessary.
Servicing Plungers
1. Turn plunger retaining nut 5 or 6 turns using a 13
mm wrench to loosen. Push plunger toward crank-
case to separate plunger and retaining screw.
2. Remove nut from plunger. Examine and clean
o-ring, backup ring, and copper bearing/gasket
washer.
3. Remove plunger and flinger from plunger shaft.
Clean parts as necessary.
4. Inspect plunger shaft for oil leakage from crank-
case. If leaking is obvious, replace oil seals. Other-
wise, DO NOT remove these seals, they cannot be
reused. Order Oil Seal Kit 245604 for replacing
seals.
5. Lightly grease flinger (and oil seal if it is being
replaced), and install on plunger shaft. Then
install plunger.
6. Lightly grease retaining screw and outer end of
plunger. Place washer, o-ring, and backup ring
around screw, and install nut through plunger.
Torque to 11 ft-lb (15 N
S
m).
NOTE:
If replacing packings, see Servicing the V-
packings page 9.
7. Lubricate outside of each plunger. Slide manifold
onto crankcase, being careful not to damage
seals.
8. Install cap screws and washers finger tight. Torque
the screws to 8.8 ft-lb (12 N
S
m) following tighten-
ing pattern (Fig. 1). Uneven tightening could cause
manifold to bind or jam.
1
4
2
3
5
8
7
6
9278
Fig. 1
