Ransburg DR-1 Fluid Regulator 74151 - Manual (Page 16)

TEST PROCEDURES
(Refer to Figure 1)
After repair is complete, test the regulator in the fol-
lowing manner:
1. Set air and fluid regulators to zero and attach air
and fluid lines to the regulator.
2. Gradually increase air pressure to the regulator
to 80 psi, visually checking for leaks. Tighten Item 4
(screws) if leakage occurs.
DR-1 Fluid Regulator - Maintenance
13
PREVENTIVE MAINTENANCE
1. Rebuild with 73913, Repair Kit, and 74160-00,
needle and seat, at 6 months minimum, 12 months
maximum.
2. Re-torque eight (8) screws at the following inter-
vals:
• 2 days after rebuild
• Immediately before installation
• 6 month intervals
13. Place Item 2 (spacer ring) on the top of Item 14
(center diaphragm) with largest opening facing
"DOWN". Rotate Item 2 (spacer ring), without rotat-
ing the diaphragm assembly, so that the air pilot
port of Item 2 (spacer ring) is 45 o to the outlet port
of Item 3 (lower housing) and all the clearance holes
are aligned (see Figure 1).
14. Place Item 9 (upper diaphragm) on Item 2 (spacer
ring) and align holes.
15. Place Item 1 (cap) on Item 9 (upper diaphragm).
Align holes and insert Item 4 (8 screws).
16. Tighten opposing screws alternately to 10 lbs•in,
ensuring uniform sealing of the diaphragms. Then
follow by tightening each screw in a circle pattern to
20 lbs•in.
17. If Item 15 (air fittings) were removed from either
Item 2 (spacer ring) or Item 1 (cap), screw them along
with Item 18 (gasket) back onto these items.
3. Set air regulator to zero. Gradually increase fluid
pressure to 80 psi, visually checking for leakage.
Clean or replace Item 11 (needle and seat) if leakage
at outlet port.
4. Gradually increase air pressure on either of the air
lines and visually observe a gradual increase in fluid
flow. If regulator does not perform satisfactorily,
inspect components for damage and replace where
required.
> DO NOT overtighten the air fittings. Over-
tightening the fittings may cause the stem of
the fitting to snap off.
C A U T I O N
!
> If water or solvent is used for testing, it
is normal for minor leakage to occur at the
fluid output port, due to the low viscosities
of these fluids.
NOTE
LN-9223-00.10