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DR-1 Plastic Fluid Regulator - Operation
MAINTENANCE
TOOLS REQUIRED
• 3/4-inch Open End Wrench
• Adjustable Wrench
• Screwdriver
• Repair Kit, 73913-01
PRELIMINARY PROCEDURES
Prior to removing the regulator for service or repair,
perform the following:
1. If possible, flush the regulator with suitable clean-
ing solvent.
2. Turn the fluid and air "OFF" to the regulator and
disconnect the air and fluid lines from the regula-
tor.
3. Remove the regulator for service.
DISASSEMBLY PROCEDURES
(Refer to Figure 1)
>
Unless replacing the cap or spacer ring,
it is NOT necessary to remove the air fittings.
>
The regulating needle and seat are a
matched set with matching serial numbers.
Care must be taken to not use needles and
seats with non-matching serial numbers as
fluid leakage may occur. If either compo-
nent needs to be replaced, a new matched
set must be used.
9
NOTE
1. Remove Item 4 (8-screws) holding the regulator
assembly together with the screwdriver.
2. Remove Item 1 (cap), Item 9 (diaphragm), spacer
ring assembly and the lower housing assembly.
C A U T I O N
!
>
When separating parts it may be necessary to
use a small screwdriver. Care should be taken to
NOT damage the plastic components. Damage
of these parts may cause leakage.
3. With screwdriver, remove Item 15 (screw) from
the spacer ring assembly.
4. Separate Item 6 (lower diaphragm retainer), Item
10 (o-ring), Item 8 (lower diaphragm), Item 16 (bleed
spacer), Item 14 (center diaphragm) and Item 5 (upper
diaphragm retainer) from the spacer ring assembly.
5. With the 3/4-inch open-end wrench, remove
Item 13 (retaining plug), Item 12 (spring) and Item
11 (regulating needle) from Item 3 (lower housing).
6. Remove Item 11 (regulating seat) and Item 10
(o-ring) from the lower housing assembly.
7. Clean all metal parts with suitable cleaning solvent.
DO NOT use solvent on the diaphragms or o-rings.
C A U T I O N
!
>
Care MUST be taken while cleaning the coated
parts of the regulator to prevent scratching.
LN-9228-00.3
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