13
the tapped center hole of the end cap.
WARNING A small amount of pressurized trapped air
may be present under the end cap. End cap may eject
suddenly as it is being removed, even if the pump air pressure
gauge indicates zero (0) psi/bar. To prevent possible eye
injury, wear safety goggles during disassembly procedures.
3.
Using a snap ring pliers, remove the snap ring.
4. Using a suitable needle nose pliers, grasp the head of the
M5 bolt. Pull straight up and remove the end cap from the
bore of the shuttle valve assembly.
5. Remove the M5 bolt from the end cap and reinstall it in the
tapped center hole of the piston.
6. Using a suitable needle nose pliers, grasp the head of the
M5 bolt. Pull straight up and remove the piston from the bore
of the shuttle valve assembly.
8.5.2 Inspection
1. Using a clean, lint free rag, remove the old grease lubricant
from piston, end cap, and from the valve assembly bore.
2. Inspect piston and end-cap for excessive wear, nicks,
scratches, corrosion or other problems.
2
3
4
1
*
Figure 18 - Air Shuttle Valve Components
1. Snap Ring
2. End Cap
3. Piston
4. Housing
*
M5
Bolt
(user-supplied)
3.
Check the condition of all piston seals. Replace entire piston
assembly if seals are worn or damaged.
NOTICE
If obvious wear or damage is indicated, replace the
entire air shuttle valve assembly. Individual components and
seals are not sold separately.
8.5.3 Reassembly
1. Using a small brush, lubricate the O-rings and seals on the
2. Locate the air fi lter/regulator. It is mounted inside the pump
shroud.
3. Grasp the fi lter bowl and depress the release button.
Pull straight down and remove the fi lter bowl from the air
regulator. See Figure 17.
4. Drain any accumulated water from the fi lter bowl. Remove
any dirt or debris. Wipe the fi lter bowl clean.
5. A
fi lter element is located inside the air regulator housing.
Using a clean rag, wipe off any loose dirt or dust from the
fi lter element.
NOTICE
If the fi lter element is very dirty, or if the fi lter bowl is
damaged, replace the entire fi lter/regulator. Replacement parts
are not available from Milwaukee Cylinder for this device. Order
complete fi lter/regulator unit. Refer to pump repair parts sheet
for fi lter/regulator part number.
6. Reinstall the fi lter bowl in the air regulator. Be sure it locks
into place.
7. Reconnect the air supply hose to the pump air inlet
connection. Test pump operation without load before
placing the pump back into service.
Filter Bowl
Figure 17 - Air Regulator and Filter Bowl
Air Regulator
8.5 Air Shuttle Valve Routine Maintenance
The pump air shuttle valve is located on the right-hand side of
the pump element (when the pump is viewed from the rear).
The valve end cap and piston must be inspected, cleaned and
lubricated at the recommended time interval to ensure optimum
pump operation.
NOTICE
Disassemble and inspect the pump air shuttle valve at
least every 100,000 cycles.
Refer to Figure 18 during the following procedures.
8.5.1 Disassembly
1. Fully relieve pressure in the pneumatic and hydraulic
circuits. Disconnect hoses. Remove pump shroud. Refer to
maintenance preparation procedures in Section 8.1 of this
manual. Also refer to pressure relief procedures in Section
6.3.
2. To aid end cap removal, install an M5 bolt (user supplied) in
