
11.2.8 Checking the Nitrogen Precharge
Chamber.
(Refer to Figure 11-4.)
~
WARNING
When checking the chamber, make
sure no one is in the vicinity of the
demolition tool. If the demolition
tool is jammed, an increase in
pressure in the chamber may re-
lease it suddenly.
1. Clean the area around the fill valve plug
G
on cylinder head.
2. To check the pressure, lay the Street
Hammer on its side with no contact
pressure on the demolition tool.
3. Remove the screw plug from fill valve
G.
4. Firmly insert test gauge hose into fill
valve. Refer to Figure 11-4.
5. Read the pressure.
6. Refer to the following table for the cor-
rect pressure. A tolerance of plus 0/ mi-
nus 5 psi is acceptable. Pressures are
given for temperatures at 70
o
F. (21
o
C.)
and 150
o
F. (65
o
C.)
7. After pressure reading is obtained,
quickly remove test gauge nozzle from
fill valve
G
. The fill valve check will au-
tomatically close to seal.
8. Replace fill plug in fill valve.
~
WARNING
Before removing the complete fill
valve
G
for repair, the precharge
chamber must be totally
depressurized or injury could result.
~
CAUTION
Use only the hose nozzle to relieve
the precharge chamber pressure.
Using nails, screwdrivers or similar
objects will damage the fill valve.
6-1-03
11-6
A
LLIED
Street Hammer
AS Series
Pressure
Gauge
G
Figure 11-4. Typical Street Hammer Nitrogen
Precharge Chamber
Nitrogen Precharge Chamber Pressure
Pressure given in PSI (Bar)
AS 342
AS 352
AS 362
AS 370
AS 380
70
o
F. (21
o
C.)
233
(16.1)
259
(17.8)
237
(16.3)
185
(12.7)
207
(14.3)
150
o
F. (65
o
C.)
270
(18.5)
300
(20.5)
275
(19)
215
(15)
240
(16.5)
Содержание AS 342
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