Jet JAT-900, Operations & Parts Manual, Page: 7 / 16

JET 7
Setup and Assembly
Any missing parts or damage should be reported
immediately to your JET
®
distributor. Do not use a
damaged tool. Read this instruction manual
thoroughly for operation, maintenance and safety
instructions.
Box contents:
1 Pneumatic hammer
1 Spring retainer
4 Chisels
1
Operation and parts manual
1 Warranty card
Operation
The air hammer must be
properly lubricated before operation. See
“Lubrication” section.
Figure 1
1. Insert chisel shank into cylinder of air
hammer. Slide spring retainer over chisel
and screw it all the way onto cylinder; use
rear tab for leverage. Make sure front coil of
spring surrounds chisel (inset, Figure 1).
2. Pull on chisel to verify it is secure.
3. Remove protective cap from air inlet (Figure
1). If an in-line oiler is not being used, add 4
or 5 drops of air tool oil (not included) into the
air inlet.
4. Blow out air line to remove any dirt or
moisture, then connect air supply hose to
tool. Set air pressure to 90 psi.
IMPORTANT: Connecting a quick-change
coupling directly to the tool is not
recommended, as vibration may cause the
connection to fail. Instead, add a leader hose
and install any quick-change couplings
farther down the line.
5. Adjust speed with air regulator knob.
6. Hold air hammer with both hands, and press
chisel blade against target surface. Press
trigger to begin hammering action.
7. Release trigger to stop air hammer.
Four chisels are provided with the air hammer
(Figure 2).
Figure 2 (p/n JSG-1304)
A. Flat chisel
B. Nut splitter
C. Tapered punch
D. Panel cutter
Maintenance
Lubrication
The air hammer should be lubricated daily (or
before each use) with air tool oil through the air
inlet. During continual operation, it should be re-
oiled every 1 to 2 hours. This can be done with an
in-line oiler, or manually. If done manually,
proceed as follows:
1. Disconnect air hose from tool.
2. Place 4 or 5 drops of air tool oil into air inlet
(Figure 1).
NOTE: Air tool oil not provided; it is available
at most major hardware and tool stores. SAE
#10 oil or sewing machine oil may be used
as a substitute. Do not use detergent oil.