Pump Repair/Servicing
Replace the Pump Rod Seals:
Remove foot
valve (24) from pump tube (21). Remove
pump tube (21) from adapter (17) and slide
off. Grip rod (30) on knurl, then use a
spanner wrench to remove fluid piston nut (32).
Remove the six socket head cap screws (19)
from housing (10). Slide plate (18) off over rod
(30). Slide adapter (17) off over rod (30). Now,
in a soft jaw vice of a suitable fixture, clamp
the adapter (17) horizontally. With a spanner
wrench, remove the floating seal nut (12)
from the adapter (17). Now seals (13, 15,
and 16) are accessible. Change as required.
Reassemble in reverse order,
being sure to
use grease (Balcrank p/n 826733) on seal (15)
to ease reassembly.
Replacing Fluid Piston Components:
With a
pipe wrench, clamp on the knurl of the fluid rod
(30) and remove the fluid piston nut (32) using
a spanner wrench. Inspect the fluid piston ball
(22), spring (31), and the ball seat for wear
and replace as needed. Remove quad ring
(33) and wear band (34) from the fluid piston
nut (32). Inspect and replace as required.
Reassemble in reverse order,
being sure to
use grease (Balcrank p/n 826733) on all seals.
Foot Valve:
With a pipe wrench, clamp to
the knurl on tube (21). Now remove foot
valve (24). Remove and inspect pin (25) for
wear, straightness, etc. Replace if required.
Remove foot valve ball (22) and o-ring (23),
inspect, and replace if required. Reassemble
in reverse order.
STEM (26)
PUMP ROD (30)
Caution:
Before servicing, reduce
fluid pressure to zero. For safe
handling, use the recommended
Pressure Relief Procedure
listed
below.
Pressure Relief Procedure:
To reduce the risk of serious bodily injury,
including fluid injection or splashing into the
eyes and /or onto skin, follow the procedure
below before maintaining or repairing the
pump, the solenoid, or any part of the system.
1. Disconnect the air supply from the pump.
2. Open the dispensing valve into an ap-
proved waste container to relieve pressure
on the system.
3. Leave any bleed-type drain valves open
until you are ready to use the system
again.
Note:
The air motor is lubricated with
a life-tested synthetic grease (Balcrank
p/n 826733) at the factory. This
grease coats all parts and repels
air line moisture to inhibit corrosion.
It is imperative that any grease
removed during maintenance be
replaced afterwards. Contact your
local Balcrank
®
distributor, using the
above part number, for replacement
grease.
6
!
