3
5.2 Lifting the Load
1. Using end of pump handle, turn relief valve stem
clockwise until valve is fully closed.
CAUTION
To prevent damage, do not use
excessive force when closing the relea
se valve.
2. Position jack under proper lift point. Refer to Section
8.0 for jack transporting and positioning information.
3. Insert pump handle into handle socket. Length and
quantity of handle segments will vary, depending on
jack model.
Model GBJ100 has two pumps. For this
jack model, insert pump handle into the socket on the
low pressure pump.
4. Operate pump handle until the saddle makes solid
contact with the load. On models equipped with an
extension screw, adjust the
screw height as required.
Be sure that the load is
perpendicular to the center
of the jack saddle.
During
lifting, the inclined load must
not exceed 6 degrees. See
Fig. 3.
5.0 OPERATION
5.1 Before Using the Jack
1. Inspect the condition of the jack before use. Do not
use the jack if it is damaged, missing parts or if it is
leaking oil. Refer to Section 6.3 for a detailed list of
inspection items.
2.
Lubricate the pump linkage and pivot pins with
lubricating oil. Refer to Section 6.4 for lubrication
points.
3. Remove oil fill/air release plug and check oil level.
Refer to Section 6.1 for oil specifications and
additional information.
4.
Using end
of pump handle,
turn relief valve stem counter-
clockwise to open valve
(do not turn more than two
revolutions). See Fig. 2.
5.
Insert pump handle into
handle socket. Operate
handle 6 to 8 strokes. This
will help lubricate the pump’s
internal parts prior to lifting.
If ram rises erratically or if a spongy feel is
noticed while pumping under load, perform air bleeding
procedure. Refer to Section 6.2.
Fig. 1 - Features and Components
Key:
1. Saddle (all except GBJ002LA)
2. Ram
3. Oil Fill/Air Release Plug
4. Handle Socket
5. Pump
(all except GBJ100)
6. Release Valve
7. Pump Handle
8. Low Pressure Pump
(GBJ100 only)
9. High Pressure Pump
(GBJ100 only)
10. Pressure Gauge
(GBJ100 only)
11. Positioning Handle
(GBJ020A thru
GBJ100 only)
Models GBJ002A - GBJ050A
Fig. 2 - Release Valve
OPEN CLOSE
Model GBJ100
GBJ002LA ONLY
Fig. 3 - Inclined Load
OPEN CLOSE
7
8
6
9
3
4
4
1
11
10
2
2
3
6
7
4
2
5
11
1
1
7
8
6
9
3
4
4
1
11
10
2
2
3
6
7
4
2
5
11
1
1
Summary of Contents for GBJ Series
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