Blagdon Pump B75 Non-Metallic - Manual (Page 21)

s30nmdl2sm-rev0312 Model B75 Non-Metallic Design Level 2 Page 21
2/07 Model B75 Non-Metallic Design Level 2 Page 18
AIR DISTRIBUTION VALVESERVICING
To service the air valve first shut off
the compressed air, bleed the pressure
from the pump, and disconnect the air
supply line from the pump.
STEP #1: See Composite Repair and
Parts Drawing.
Using a 5 /
16
" Allen wrench, remove
the four hex socket capscrews (item 14)
and four flat washers (item 41). Remove
the air valve assembly from the pump.
Remove and inspect gasket (item 23)
for cracks or damage. Replace gasket if
needed.
STEP #2: Disassembly of the air
valve.
To access the internal air valve
components first remove the two retaining
rings (item 1-H) from each end of the air
valve assembly using clip ring pliers.
Next remove the two end caps (item
1-E). Inspect the o-rings (item 1-G) for
cuts or wear. Replace the o-rings if
necessary.
Remove the two bumpers (item 1-C).
Inspect the bumpers for cuts, wear or
abrasion. Replace if necessary.
Remove the spool (part of item 1-A)
from the sleeve. Be careful not to stratch
or damage the outer diameter of the
spool. Wipe spool with a soft cloth and
inspect for scratches or wear.
Inspect the inner diameter of the
sleeve (part of item 1-A) for dirt,
scratches, or other contaminates.
Remove the sleeve if needed and
replace both the sleeve and spool with
a new sleeve and spool set (item 1-A).
STEP #3: Reassembly of the air
valve.
Install one end cap (item 1-E) with
an o-ring (item 1-G) and one bumper
(item 1-C) into one end of the air valve
body (item 1-B). Install one retaining ring
(item 1-H) into the groove on the same
end.
Remove the new sleeve an spool set
(item 1-A) from the plastic bag. Carefully
remove the spool from the sleeve. Install
the six o-rings (item 1-G) into the six
grooves on the sleeve. Apply a light
coating of grease to the o-rings before
installing the sleeve into the valve body
(item 1-B), align the slots in the sleeve
with the slots in the valve body. Insert
the spool into the sleeve. Be careful not
to scratch or damage the spool during
installation. Push the spool in until it
touches the bumper on the opposite end.
Install the remaining bumper, end cap
with o-ring, and retaining ring.
Fasten the air valve assembly (item
1) and gasket (item 23) to the pump.
Connect the compressed air line to
the pump. The pump is now ready for
operation.
Read these instructions
completely, before in-
stallation and start-up. It
is the responsibility of
the purchaser to retain
this manual for reference. Failure to
comply with the recommendations stated
in this manual will damage the pump, and
void factory warranty.
IMPORTANT