FLOOR MAT 3843857 - Caterpillar

Relief Valve Settings
Illustration 1 g02790029
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    Machine Settings    New
Rebuild (1)    Service Limit (2)    
Main     Implement     Speed Dial "10"
AEC switch OFF     35000 500 kPa (5076 73 psi)    
35000 500 kPa (5076 73 psi)    
Travel
Boom     Head End     Speed Dial "10"
AEC switch OFF    
37000 500 kPa (5366 73 psi)     ≥
34300 kPa (4975 psi)    
Rod End
37000 500 kPa (5366 73 psi)     ≥
34300 kPa (4975 psi)
Stick     Head End     Speed Dial "10"
AEC switch OFF    
37000 500 kPa (5366 73 psi)     ≥
34300 kPa (4975 psi)    
Rod End
37000 500 kPa (5366 73 psi) ≥
34300 kPa (4975 psi)    
Bucket     Head End     Speed Dial "10"
AEC switch OFF    
27500 1000 kPa (3989 145 psi)    
Rod End
29900 1000 kPa (4337 145 psi)    
Swing     Right     Speed Dial "10"
AEC switch OFF    
24550 1000 kPa (3561 145 psi)    
24550 1000 kPa (3561 145 psi)    
Left
Left Crossover     Forward     Speed Dial "10"
AEC switch OFF    
37000 1500 kPa (5366 218 psi)     ≥
34300 kPa (4975 psi)    
Reverse
Right Crossover     Forward    
Reverse
Pilot     Speed Dial "10"
AEC switch OFF    
4100 200 kPa (595 29 psi)    
( 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 (1)    Torque for Locknut    
Main valve    
4430 kPa (650 psi)    
29.4 2 N m (21.7 1.5 lb ft)    
Line relief valve    
17600 kPa (2550 psi)    
27 1.5 N m (19.9 1.1 lb ft)    
Swing relief valve    
6000 kPa (875 psi)    
80 8 N m (60 6 lb ft)    
Travel crossover relief valve    
3050 kPa (440 psi)    
130 13 N m (96 10 lb