Case CX80C Midi Excavator Service Manual

Table of Contents

1. Content
2. Introduction
3. Engine
4. Hydraulics System
5. Frames and Ballasting
6. Tracks and Track Suspension
7. Cab Climate Control
8. Electrical System
9. Booms, dippers and buckets
10. Dozer Blade and Arm
11. Platform, cab, bodywork and decals
12. Special Tools Index
13. Electrical Schematic
14. Hydraulic Schematic

Manual Extract: Boom lifting cylinder holding valve – Remove

1. Remove the boom cylinder. For details, see “ Boom cylinder – Remove (35.736)”.
2. Use a wrench [ 17 mm] to remove the bolt (1), and use a wrench [ 36 mm] to remove the line (2).
• Use caps or plugs to cover the HBCV and lines to prevent any entry of water, dust or dirt.
• Clean the HBCV and lines by spraying them with a parts cleaner to prevent scratches and prevent dirt from accumulating on the connectors.
3. Use wrenches [ 27 mm, 36 mm] to remove the line (1).
• Use caps or plugs to cover the HBCV and lines to prevent any entry of water, dust or dirt.
• Clean the HBCV and lines by spraying them with a parts cleaner to prevent scratches and prevent dirt from accumulating on the connectors.
4. Use a wrench [ 17 mm] to remove the 2 bolts (1), and then remove the boom HBCV (2).
• Tightening torque for bolt installation: unknown