troubleshooting
Model VC
page 12 of 12
JARVIS
6222009::.
PRODUCTS CORPORATION
33 ANDERSON ROAD, MIDDLETOWN, CONNECTICUT 06457--4926
UNITED STATES OF AMERICA E--MAIL. [email protected]
TEL. 860--347--7271 FAX. 860--347--6978 WWW.jarvisproducts.com
®
PROBLEM
SOLUTION
MOTOR RUNS WHEN THE TRIGGER IS RELEASED.
Refer to page 4 for referenced items
.
CHECK THE AIR MOTOR TRIGGER (ITEM 38).
If the trigger flops in and out or stays depressed when touched,
it is malfunctioning. Remove the air inlet valve (item 32) and
valve stem pin (item 33). With long nose pliers, remove valve
pin (item 34). Clean pins until their surfaces are smooth. Clean
out the deepest hole in the pistol grip handle (item 22) with a drill.
Rotate the drill by hand. Do
not
increase the size of the hole.
CHECK THE O--RING LOCATED IN AIR INLET VALVE (ITEM
32).
Remove the retaining ring, screen, spring, and poppet from the
air inlet valve (item 32). Check for an o--ring on the poppet. If
there is no o--ring on the poppet, check the inside of the air inlet
valve. Reassemble the o--ring to the poppet and reassemble the
air inlet valve.
BLADE DOES NOT ROTATE AND SHUT OFF WHEN TRIG-
GER IS PULLED.
ADJUST AIR REGULATOR (ITEM 58).
Pull trigger on Model VC, and turn air regulator knob (item 58)
Refer to page 5 for referenced items.
gg
,
g
(
)
clockwise until the blade on the vent gun turns off. Continue to
adjust until desired number of blade rotations is accomplished.
CHECK AIR PILOT VALVE (ITEM 59).
Remove four screws and cover on air pilot valve (item 59) care-
fully. Check rubber diaphragm. If the rubber diaphragm has a
hole, it must be replaced (part number 3343009).
CLEAN VENTURI ASSEMBLY (ITEM 53).
If the regulator has no range of adjustment, clean the venturi as-
sembly. Remove tube connector (item 52). Clear the small hole
in the silver pin with a small diameter wire. Do
not
increase the
size of the hole.
BLADE DOES NOT ROTATE WHEN TRIGGER IS PULLED.
Refer to pages 4 and 5 for referenced items.
CHECK THE AIR SUPPLY.
The air pressure gage (item 61) must show pressure.
CHECK THE VACUUM.
When trigger is pulled, there is suction at the blade. If there is
no suction at the blade, the air supply to the tool is shut off.
CHECK VANES (ITEM 17).
If air is exhausting through the butt of the pistol grip handle, re-
lease trigger and turn blade 1/2 revolution. Pull trigger. If the
Model VC runs properly now, it is an indication of sticky vanes
(causes: wrong oil, dirt in slots, lack of oil). Disassemble motor,
clean rotor, and check length of vanes (they should be .002
shorter than the length of the rotor). Check rotation of each bear-
ing (they should rotate freely).
WATER VALVE LEAKS.
Refer to page 4 for referenced items
.
WATER VALVE LEAKS AT TIME OF INSTALLATION.
Check for metal fragments from the threaded pipe. Remove wa-
ter tube from tube connector (item 13). Remove tube connector
(item 13). Check water valve (item 12) for debris, and remove
debris with small pointed object. Do
not
damage spring or seal.
WATER VALVE LEAKS AFTER CONSIDERABLE USE.
Replace water valve (item 12).
TROUBLESHOOTING
REMOVE ANY MALFUNCTIONING TOOL FROM SERVICE
