BLOCK AS 1262132 - Caterpillar

Illustration 1 g03804369
Relief valve locations
(1) Main control valve
(2) Stick cylinder line (head end)
(3) Stick cylinder line (rod end)
(4) Main relief valve (idler pump) (boom and bucket)
(5) Main relief valve (drive pump) (stick)
(6) Bucket cylinder line (rod end)
(7) Bucket cylinder line (head end)
(8) Boom cylinder line (rod end)
(9) Boom cylinder line (head end)
(10) Left travel crossover relief valve for forward travel (upper valve)
(11) Travel motor (left)
(12) Left travel crossover relief valve for reverse travel (lower valve)
(13) Right travel crossover relief valve for forward travel (upper valve)
(14) Travel motor (right)
(15) Right travel crossover relief valve for reverse travel (lower valve)
(16) Right swing motor
(17) Swing (left)
(18) Swing (right)
(19) Left swing motor
(20) Pilot relief valve
(21) Pilot filter
Table 1
Relief Valve Specifications Torque for Locknut
New
Rebuilt(1) Service Limit(2)
Main relief valve 35000 + 500 - 1000 kPa (5076 + 73 - 145 psi) 35000 + 500 - 2000 kPa (5076 + 73 - 290 psi) 50 10 N m (37 7 lb ft)
38000 + 500 - 1000 kPa (5512 + 73 - 145 psi)
(Heavy Lift) 38000 + 500 - 2000 kPa (5512 + 73 - 290 psi) 75 10 N m (55 7 lb ft)
Boom cylinder line (head end) 40000 500 kPa (5802 73 psi) > 35800 kPa (5192 psi) 24 3 N m (18 2 lb ft)
Boom cylinder line (rod end) 37000 500 kPa (5366 73 psi) > 32800 kPa (4757 psi)
Stick cylinder line (head end)
Stick cylinder line (rod end) 40000 500 kPa (5802 73 psi) > 35800 kPa (5192 psi)
Bucket cylinder line (head end) 37000 500 kPa (5366 73 psi) > 32800 kPa (4757 psi)
Bucket cylinder line (rod end)
Swing relief pressure (right) 334-9975 Swing Motor Gp 32000 1500 kPa (4621 218 psi) 32000 + 1500 - 2000 kPa (4621 + 218 - 290 psi) 118 10 N m (87 7 lb ft)
Swing relief pressure (left) 334-9975 Swing Motor Gp
Swing relief pressure (right) 486-5236 Swing Motor Gp 29600 1500 kPa (4293 218 psi) 29600 + 1500 - 2000 kPa (4293 + 218 - 290 psi)
Swing relief pressure (left) 486-5236 Swing Motor Gp
Left travel crossover relief valve (forward) 38200 500 kPa (5541 73 psi) > 32800 kPa (4757 psi) 92 8 N m (68 6 lb ft)
Left travel crossover relief valve (reverse)
Right travel crossover relief valve (forward)
Right travel crossover relief valve (reverse)
Pilot relief valve 4100 200 kPa (595 29 psi) 49 5 N m (36 4 lb ft)
Counterweight relief valve 20600 + 1000 - 0 kPa (2988 + 145 - 0 psi) 55 10 N m (40 7 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