C8, TM 9-2350-230-12
Figure 11-5.1. Removal/Installation - buffer bleed line
TABLE 11-2.2 FILLING AND BLEEDING GUN MOUNT HYDRAULIC SYSTEM
STEP
PROCEDURE
1
Position gun at zero elevation. Remove plug from top rear port on recoil cylinder and disconnect bleed line at
elbow fitting to exhaust air while filling recoil mechanism.
2
Disconnect hand pump outlet-to-check valve pressure line at check valve on bottom rear of recoil guard.
3
Connect a separate hydraulic fluid supply to check valve, depress recoil mechanism 3-5 degrees and fill with
hydraulic fluid filtered to 5 microns, Specification MIL-H-6083 (OHC).
4
When. fluid flows from elbow fitting, reconnect bleed line. Continue filling until fluid flows from top rear port.
5
Install plug in top rear port.
6
Elevate recoil mechanism to zero degrees. Remove filling plug in top of replenisher reservoir. Open manual
bleed valve and continue filling until replenisher reservoir fluid level is at bottom of filling plug opening.
Reinstall filling plug.
7
Operate replenisher pump until clear fluid flows from pump pressure line. This will fill and bleed suction line,
pump assembly, and pressure line.
7.1
Units with buffer bleed: Remove front plug from counter recoil buffer to bleed air from buffer. Replace plug
when oil flows out. Check oil level in replenisher and repeat step 6 if required.
8
Remove connection from separate fluid supply and re-attach hand pump pressure line to check valve.
9
Operate hand pump several times to remove any additional air in suction and pressure lines. Depress recoil
mechanism 5 degrees and let stand for 20 minutes. At end of this time, crack plug in top rear port and bleed
off any additional entrapped air by operating hand pump.
11-6.1