10
MAINTENANCE & SERVICE
DISASSEMBLY, A700 SERIES:
1. Remove air cap, detent plate, spring; spring cap,
spring, & needle. Lastly remove nozzle using nozzle
tool.
ASSEMBLY, A700 SERIES:
2. Pre-adjust needle as shown in diagram and tighten
nut. Lubricate with vaseline and install with spring, and
spring cap (loosely).
3. Adjust packings by turning the packing wrench
clockwise and triggering the needle while you
tighten.
When the needle binds, back off until the needle just
moves freely.
4. Install nozzle, spring, detent plate, and air cap.
5. Check trigger free travel.
Important: Ensure that the
fluid adjusting screw is backed out all the way.
If adjustment is required continue to step 6.
Turbine gun.....1/16" spring travel (before needle moves)
Venturi gun.....3/8" spring travel (before needle moves)
6. Adjust trigger by removing the spring cap, loosening
the lock nut and turning the drum until correct free
travel is achieved. Adjusting less than 3/8" decreases
trigger free play. Tighten lock nut and install spring with
cap.
If tool kit is required, use order #L080-650 for 1 x
packing wrench, 1 x nozzle tool, and 1 x cleaning brush.
DISASSEMBLY, A728:
1. Remove air cap ring and aircap. Next remove material
flow adjusting knob and spring from rear of gun, then
grasp needle and remove. Lastly remove nozzle using
nozzle tool or 13mm wrench.
ASSEMBLY, A728:
1. Lightly lubricate needle with vaseline and insert
through rear of gun. A728 needles require no
adjustment.
2.Install fluid nozzle and tighten 5-7 ft lb with nozzle
tool or 13mm wrench. Note: Ensure nozzle size
matches the needle in gun.
3. Reinstall spring and material flow control knob.
4. Install aircap, then install and tighten aircap ring.
5. Packing adjustment, if required, can be made by
turning the 8mm hex nut just in front of the trigger. In
the case of fluid leaking around the needle where it
enters the packing nut, just tighten the nut slightly until
the leakage stops. If the nut is overtightened, the
needle will bind. Loosen the nut slightly until the needle
moves without binding.
nozzle
1/16" spring travel, turbine
3/8" spring travel, venturi
needle
adjustment drum
spring
lock nut
adjusting
screw
spring cap
Nozzle Tool
Packing
wrench
needle packing
packing nut
Figure 21. - Needle packing adjustment (A700)
Figure 20. - Trigger adjustment (A700)
3/8"
nut
drum
Note: nozzle & needle must be the
same size, eg: a 1.6 needle will not
work with a 1.8mm nozzle.
Summary of Contents for HVLP T Series
Page 23: ...23 NOTES...
