CARBURETOR 5F1348 - Caterpillar

Illustration 5 g01229646
Main control valves (front view) (17) Line relief valve (boom cylinder rod end) (18) Line relief valve (bucket cylinder rod end) (19) Line relief valve (stick cylinder head end)
The pressure gauge reading should be 37000 + 2000 − 500 kPa (5366 + 290 − 72 psi). Refer to Table 2. If the pressure gauge reading at pressure tap (1) is not within the specification, adjust line relief valve (17) .
In order to adjust line relief valve (17), loosen locknut (15) on the boom line relief valve. Turn adjustment screw (16) until the pressure gauge reading at pressure tap (1) is 37000 + 2000 − 500 kPa (5366 + 290 − 72 psi). Refer to Table 2.Note: Always make final pressure adjustment on pressure rise.
Tighten locknut (15) on the boom line relief valve.
After completion of line relief valve adjustment for the boom cylinders, return the line relief valve