TUBE ASSEM. 8V2592 - Caterpillar

Adjustments
Introduction
Length of booms:320 L ... 15.6 m (51 ft)325 L ... 18.2 m (60 ft)The long reach front configuration is different from the standard as follows:* Line relief valve pressure settings* Slow return check valve adjustment* CounterweightReference: 320 L (1K1, 1TL, 9KK), Service Manuals, SENR6040, SENR6045 and SENR5465.Reference: 325 L (7CJ, 6KK), Service Manual, SENR5400.
The following adjustments must be performed to prevent machine damage.
Line Relief Valve Pressure Settings
Main Control Valve
(1) Bucket cylinder head end line relief valve. (2) Bucket cylinder rod end line relief valve. (3) Stick cylinder head end line relief valve.320 Excavator Bucket Cylinder Head And Rod End Lines
Adjust line relief valves to ... 19 100 980 kPa (2750 140 psi)320 Excavator Stick Cylinder Head End Line
Adjust line relief valves to ... 22 600 980 kPa (3250 140 psi)325 Excavator Bucket Cylinder Head And Rod End Lines
Adjust line relief valves to ... 19 100 980 kPa (2750 140 psi)325 Excavator Stick Cylinder Head End Line
Adjust line relief valves to ... 20 100 980 kPa (2900 140 psi)Slow Return Check Valve Adjustment
Slow return check valve (2) in the boom cylinder rod end line provides adjustment for boom cylinder speed.Slow return check valve (1) in the stick cylinder head end line provides adjustment for stick cylinder speed.The slow return check valve, when turned clockwise (viewed from the cab side), restricts the return oil flow in these lines to slow down the movement of the front attachment.
Location Of Slow Return Check Valve For Stick Cylinder Head End Line
(1) Slow return check valve.
Location Of Slow Return Check Valve For Boom Cylinder Rod End Line
(2) Slow return check valve.
Detail Of Slow Return Check ValveOperational Tests
Cylinder Operating Speed
Tools Required: StopwatchTest Conditions:* Place the machine on a level surface* Warm the hydraulic oil temperature to 55 5°C (130 9° F)* Put in power mode 3* Put in loading (boom raise) priority mode positionBoom Cylinder Retraction Test
Machine Position For Boom Cylinder Retraction TestPosition the machine as shown in the illustration. Measure the time required for the stick end to reach a height of 2000 mm (79 in) above ground level from the maximum digging height position. Adjust the slow return check valve for boom cylinder rod end line to meet the following specifications.320 L speed must be ... 3.7 0.3 seconds325 L speed must be ... 3.9 0.3 secondsStick Cylinder Extension Test
Machine Position For Stick Cylinder Extension TestPosition the machine as shown in the illustration. Measure the time required for the stick cylinder to reach full extension position from the maximum digging height position. Adjust the slow return check valve for stick cylinder head end line to meet the following specifications.320 L speed must be ... 4.7 0.3 seconds325 L speed must be ... 5.3 0.3 secondsChanging From Long Reach To Standard Reach
When changing from the long reach to standard reach configuration, make the following adjustments:1. Install the standard counterweight. 320 L long reach counterweight ... 4600 kg (10 120