SWITCH GP-MULTIFUNCTION 2138477 - Caterpillar

Table 1
Relief Valve Specifications Torque for Locknut
New
Rebuilt(1) Service Limit(2)
(C) Main relief valve 35000 + 500 - 1000 kPa (5076 + 73 - 145 psi) 33000 kPa (4785 psi) to 35500 kPa (5150 psi) 50 10 N m (37 7 lb ft)
36000 + 500 - 1000 kPa (5221 + 73 - 145 psi) (Heavy Lift) 34000 kPa (4930 psi) to 36500 kPa (5295 psi) 69 10 N m (51 7 lb ft)
(E) Boom cylinder line (head end) 39500 + 2000 - 2500 kPa (5729 + 290 - 363 psi) 36000 kPa (5220 psi) to 38500 kPa (5585 psi) 20 2 N m (14 1 lb ft)
(A) Boom cylinder line (rod end) 38000 + 2000 - 2500 kPa (5511 + 290 - 363 psi) 35000 kPa (5075 psi) to 37500 kPa (5450 psi)
(D) Stick cylinder line (head end) 38500 + 2000 - 2500 kPa (5583 + 290 - 363 psi)
(G) Stick cylinder line (rod end) 39500 + 2000 - 2500 kPa (5729 + 290 - 363 psi) 36000 kPa (5220 psi) to 38500 kPa (5585 psi)
(B) Bucket cylinder line (head end) 38000 + 2000 - 2500 kPa (5511 + 290 - 363 psi) 35000 kPa (5075 psi) to 37500 kPa (5450 psi)
(F) Bucket cylinder line (rod end)
(K) Swing relief pressure (right) 334-9970 Swing Motor Gp 26400 + 1000 - 1500 kPa (3830 + 145 - 218 psi) 24400 kPa (3540 psi) to 27400 kPa (3980 psi) 118 10 N m (87 7 lb ft)
(J) Swing relief pressure (left) 334-9970 Swing Motor Gp
(K) Swing relief pressure (right) 482-6393 Swing Motor Gp 27300 1000 kPa (3960 145 psi) 25300 kPa (3670 psi) to 28300 kPa (4105 psi)
(J) Swing relief pressure (left) 482-6393 Swing Motor Gp
(R) Left travel crossover relief valve (forward) 37500 + 1500 - 2000 kPa (5439 + 218 - 290 psi) 34500 kPa (5000 psi) to 39000 kPa (5650 psi) 90 10 N m (70 6 lb ft)
(S) Left travel crossover relief valve (reverse)
(P) Right travel crossover relief valve (forward)
(Q) Right travel crossover relief valve (reverse)
(M) Pilot relief valve 4100 200 kPa (595 29 psi) 50 5 N m (36 4 lb ft)
(1) A New specification is the performance that can be expected for a new machine. A “Rebuild” specification is the performance that can be expected after rebuilding the components of a system.
(2) Performance beyond “Service Limit” specifications is an indication of the following problems: improper adjustment, wear, damage of relief valves and damage of pumps.
Table 2
Required Tools
Part Number Description Qty
9U-7400 Multitach Tool Group 1
8T-0470 Thermometer Group 1
Table 3
Relief Valves Pressure change With One Turn Of Adjustment Screw
Main valves 14400 kPa (2100 psi)
Line relief valve 11000 kPa (1600 psi)
Swing relief valve 6800 kPa (985 psi)
Travel crossover relief valve 3050 kPa