Manual 1808 Rev B p/n 001808 0000
18
08
Disassembly / Assembly
4. Position the closed head piston with the inlet
ports of the piston slide facing away from the
discharge valve side of the pump. Place the
closed head slide pin over the piston slide with
the scalloped edge up. Slide the piston over
the cam and the slide pin into the slide pin
recess in the cylinder.
5. Apply a thin coat of Loctite 515 to the sealing
faces of the cylinder and head.
CAUTION
!
Do not allow Loctite 515 to be squeezed into
the pump, as it will cause working parts to stick
and obstruct oil ow.
6. Position the closed head on the dowel pins of
the cylinder and install the securing screws.
7. Remove the open head. Install the open head
piston and slide pin as described in Step 4,
and secure the head as in Steps 5 and 6.
Rotate the shaft to check for binding. If binding
occurs, gently tap one end and then the other
of the shaft a few times to slide the cams into
their proper running positions.
8. Coat the O-ring with vacuum oil, place the
O-ring and cap on the closed head, and secure
with screws.
9. Install the shaft seal as described in Shaft
Seal on page 22, lubricate the bearing
housing O-ring with vacuum oil, slide the
housing onto the shaft, and secure with the
O-ring in place. Slide the bearing onto the
taper sleeve with the tapered surface of the
sleeve mating with the tapered surface of the
bearing. Slide the sleeve bearing onto the shaft
with the slotted, threaded end of the sleeve
outboard. Tap the outer race of the bearing
with a soft-faced hammer until the bearing is
ush with the housing. Align the slot of the
sleeve with the hole in the shaft and insert the
dowel pin. Install and tighten the bearing lock
nut using a 6 in. spanner without benet of a
handle extension. Overtightening the lock may
cause the bearing to become distorted.
10. Install the discharge valves and replace the
cylinder cover and gasket.
11. Return the pump to the base and replace the
pulley, belts, and belt guard.
12. Replace the oil separator and gas ballast
valve, and connect the oil lines and electrical
wiring.
13. Close the oil drain valves and ll the pump
with oil. Test the pump per Checking Pump
Performance on page 19.
14. Reconnect the manifolding to the pump.
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