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53. SERVICE WHEN FILLING AND CHARGING.

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d. Testing for leaks in pressure system. After charging and * * * to test pressure. ([Fig. 32].) To install gage, unscrew check-valve cap, moisten end of check valve with water or saliva, and screw gage in check-valve body. Use of water or saliva as lubricant prevents cutting of the rubber washer by the check valve. If pressure has * * * and then retested.

66. PRESSURE TANK AND VALVE ASSEMBLY.

a. Description and functioning. The pressure tank * * * assembly ([Fig. 33]) includes:

(1) Pressure tank. The pressure tank * * * the fuel tanks. The pressure-tank clamp may be adjusted to different outside diameters of pressure tanks by means of a nut and screw tightening device ([fig. 35.1]) or by means of a stepped ring at end of clamp.

Figure 35.1. (Added.) Adjustable pressure tank clamp, showing use of nut and screw tightening device.