Ransburg No. 2 Process Handgun Electric Motor - Manual (Page 28)

No. 2 Process Electric Motor Version - Maintenance
Ransburg
24 AH-13-01.1
NOTE
NOTE
4. Clean the fluid line filter. See “Filter Cleaning
or Replacement” in the “Maintenance” section of
this manual.
Weekly
1. Inspect all equipment for damage, leaks, or
paint buildup.
2. Measure the electrical output of the gun. The
short circuit current should be 80 to 115 micro-
amperes (.08 to .115 milliamperes on some meter
scales). Refer to the “Gun Output Test (SCI)” in
the “Maintenance” section for procedure.
Check ALL o-rings for fit and deterioration.
TEST PROCEDURES
Fluid Testing
Needle Locknut Adjustment
When the paint does not shut-off after the trig-
ger has been released, adjust the knurled nuts
(in front of trigger). If this does not correct the
problem, refer to the “Troubleshooting Guide” in
the “Maintenance” section.
1. Turn the outer locknut a few times counter-clock-
wise. DO NOT thread it off the needle.
2. Adjust the inner locknut counter-clockwise, to
allow the needle to completely seat, and hold the
trigger firmly.
3. Make further adjustments of the outer and
inner locknuts as needed for fine adjustment of
fluid delivery with thin viscosity paints.
† If a proper reading is not obtained, per-
form the same test on a spare gun (if one
is available). If the spare gun test reading
is normal, refer to the “Troubleshooting
Guide” in the “Maintenance” section. If no
spare gun is available, perform a short cir-
cuit cur-rent test of the power supply.
† When the motor circuit is activated the
shaft will be rotating and the HIGH VOLT-
AGE WILL BE ON.
† Primary fluid pressure control is from
the paint pot regulator.
ELECTRICAL TESTING
If an electrical malfunction should occur in the
system, check the hand gun, high voltage cable,
supply fuses, and the power source according to
the prescribed test procedures for each. After
these electrical tests have been completed and it
is determined that a fault may exist in the power
supply, make the high voltage short circuit cur-
rent test as indicated in the power supply service
manual.
† These tests should be made as ad-
vised under the “Maintenance” section of
the manual.
TOOLS REQUIRED
76652-02 or 76652-04 Ransburg
Testers Kit
Gun Voltage Output (SCI)
The Short Circuit Current (SCI) will determine if
the high voltage portion of the system is operat-
ing correctly by shorting the maximum current
flow to ground. The SCI reading on either the
power supply current meter and/or the externally
connected meter at the contact brush should
be between 80 and 115 microamperes (.08 and
.115 milliamperes). Readings outside this range
indicate possible component failure and indicate
the need for further testing and/or repair. There
are two procedures that can be used to perform
an SCI Test..
NOTE