D399, G399, D398, G398, D379, G379 ENGINES Caterpillar


Differential Pressure Regulator
(7S7810)

Usage:



(1) Valve testing dimension with two 1S9030 Spacers (5) in place:

Pressurize chamber at (A) to ... 6.65-7.20 PSI(0,47-0,51 kg/cm2)

Test maximum dimension should be ... 2.893 in.(73,48 mm)

(2) 2S4655 Spring:

Length under test force ... 3.05 in.(77,5 mm)

Test force ... 81.5 ± 4 lb.(37 ± 2 kg)

Free length after test ... 4.28 in.(108,7 mm)

Outside diameter ... 2.63 in.(66,8 mm)

(3) Torque for nut ... 110 ± 10 lb. in.(126 ± 12 cm.kg)

(4) Torque for bolts ... 55 ± 15 lb. in.(63 ± 17 cm.kg)

(5) 1S9039 Spacers for altitude adjustment:

Use two between ... 0-1500 ft.(0-457 m)

Use one between ... 1500-4000 ft.(457-1219 m)

Use none between ... 4000-6500 ft.(1219-1981 m)

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