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SEAL AS-RH 4Z8608 - Caterpillar



4Z8608 SEAL AS-RH Caterpillar parts SEAL
Rating:
66
Alternative (cross code) number:
CA4Z8608
4Z-8608
4Z8608
Caterpillar 4Z8608 SEAL AS-RH
Weight: 23 pounds 10 kg.

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Illustration 1 g03863115
Relief valve locations
(1) Main relief valve
(2) Boom cylinder line (head end)
(3) Boom cylinder line (rod end)
(4) Stick cylinder line (head end)
(5) Stick cylinder line (rod end)
(6) Bucket cylinder line (head end)
(7) Bucket cylinder line (rod end)
(8) Swing (right)
(9) Swing (left)
(10) Left travel crossover relief valve for forward travel (upper valve)
(11) Left travel crossover relief valve for reverse travel (lower valve)
(12) Right travel crossover relief valve for forward travel (upper valve)
(13) Right travel crossover relief valve for reverse travel (lower valve)
(14) Pilot relief valve
(15) Main control valve
(16) Pilot filter
(17) Travel motor (right)
(18) Travel motor (left)
(19) Swing motor
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) 69 10 N m (51 7 lb ft)
Boom cylinder line (head end) 40000 500 kPa (5802 73 psi) ≥ 35800 kPa (5192 psi) 20 2 N m (14 1 lb ft)
VA Boom cylinder line (head end)
Boom cylinder line (rod end) 37000 500 kPa (5366 73 psi) ≥ 32800 kPa (4757 psi)
VA Boom cylinder line (rod end)
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) 25500 + 1000 - 1500 kPa (3698 + 145 -218 psi) 25500 + 1000 - 2000 kPa (3698 + 145 - 290 psi) 117 10 N m (85 7 lb ft)
Swing relief pressure (left)
Left travel crossover relief valve (forward) 37000 500 kPa (5366 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)
(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
Relief Valves Pressure change With One Turn Of Adjustment Screw
Main valves 14400 kPa (2100 psi)
Line relief valve 19800 kPa (2870 psi)
Swing relief valve 6800 kPa (985 psi)
Travel crossover relief valve 3050 kPa (440 psi)
Pilot relief valve 620 kPa (90 psi) Note: Pressure values in Table 2


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