Doosan DX235LCR-5 Excavator Service Manual

Table of Contents:-

Safety
1 Track Excavator Maintenance Safety
Specifications
General Maintenance
1 General Maintenance Instructions
2 Standard Torques
Engine
Upper Structure
1 Cabin
2 Counterweight
3 Oil Tank
4 Fuel Tank
5 Main Pump
6 Drive Coupling (Main Pump)
7 Main Control Valve
8 Swing Device
9 Joystick Valve (Work Lever)
10 Dozer Joystick Valve
11 Travel Control Valve (with Damper)
12 Solenoid Valve
13 EPPR Valve (One or Two Way)
14 Accumulator
15 Gear Pump (Rotating)
16 One Spool Valve (Rotating)
Lower Structure and Chassis
1 Swing Bearing
2 Center Joint
2 Center Joint (Dozer)
4 Travel Device
5 Track Assembly
6 Dozer System
Front
1 Boom and Arm
2 Bucket
3 Cylinders
Hydraulic System
2 Hydraulic System Testing and Adjustment
3 Hydraulic System Troubleshooting
9 Electrical System 1 Electrical System
Options
1 One Way
2 Two-way
3 Rotating
4 Quick Coupler
Schematics

Doosan DX235LCR-5 Manual Instruction Extract:

Replacement of Spool

1. Removing Pilot Cap
Unfasten the two bolts for the pilot cap with a L-wrench (5mm) and remove the cap along with the washer.
(You can remove either of them.)

2. Removing Spool
After fixing the main body and removing the return spring and the spring seat first, pull the spool in the horizontal direction (parallel to the spool hole) to remove it from the main body.
Too much impressed force for disassembly may damage the spool. When the spool is stuck, therefore, push it back smoothly and try to pull the spool while rotating it.
While removing the spool, check which end has the mark.

3. Assembling Spool
Insert the spool into the fixed main body. (Overloaded force may damage the main body or the spool. When the spool is stuck, pull it back and press it smoothly while rotating it.)
Check the direction of the mark, identified during the disassembly operation.
Assemble the spring seat and the spring.

4. Assembling Pilot Cap (on Return Spring Side) Cover the pilot cap on the return spring of the spool, previously assembled to the main body, and fasten it with two bolts at the specified standard torque using a torque wrench (5mm). Check if there is the O-ring on the contacting surface.
• Torque: 10.8 N.m (1.1 kg.m, 8 ft lb)