13
4
Control valve
Disassembly anD assembly
4J0aX00
Control valve
Inspection and adjustment
Checking the parts
Parts
Judgment criteria
treatment
Housing, valve body
• Scratches, rust or corrosion on the parts sliding against the
spool
• Scratches, rust or corrosion on the seal pocket part that
the spool enters
• Scratches, rust or corrosion on the seal part on the port
that is in contact with the o-ring
• Scratches, rust or corrosion on the seal part of the relief
valve, etc.
• Other damage considered to impair normal functions
replace
replace
replace
replace
replace
spool
• Scratches on the sliding surface of outer circumference, on
which the fingernails get caught
• Scratches on parts that slide against the seals at both
ends
• Spool does not move smoothly
replace
replace
repair or replace
load check valve
• Imperfect sealing due to damage to the valve or spring.
• Operates smoothly when inserted and operated in the
housing
repair or replace
normal
around the springs
• Rust, corrosion, deformation, breakage or other notable
damage to the spring, holder or cover
replace
around the spool seal
• Oil leakage to the outside
• Rust, corrosion or deformation of the seal holder
repair or replace
repair or replace
main relief valve, port re-
lief valve, anti-cavitation
valve
• External rust, damage
• Damage to valve seat contact surface
• Damage to poppet contact surface
• Abnormality in the spring
• O-rings, backup rings, seals
replace
replace
replace
replace
replace as a rule
adjusting the main relief valve pressure
“2. service data, Performance criteria”
Summary of Contents for TB215R
Page 1: ...CC8E005 WETB215R_A XI Seral No 215000003...
Page 3: ...SAFETY 1...
Page 13: ...SERVICE DATA 2...
Page 16: ...SERVICE DATA DIMENSIONAL DRAWING 3 2 DIMENSIONAL DRAWING 2A0AX001 Operating range 2A0AX02...
Page 53: ...SERVICE DATA WIRE HARNESS DIAGRAM 2 2 WIRE HARNESS DIAGRAM 2H0AX00 Body harness 03342 68000...
Page 54: ...SERVICE DATA WIRE HARNESS DIAGRAM 3 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 55: ...SERVICE DATA WIRE HARNESS DIAGRAM 4 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 56: ...SERVICE DATA WIRE HARNESS DIAGRAM 5 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 57: ...SERVICE DATA WIRE HARNESS DIAGRAM 6 2 WIRE HARNESS DIAGRAM 2H0AX00...
Page 58: ...FUNCTION 3...
Page 88: ...DISASSEMBLY AND ASSEMBLY 4...
Page 125: ...DISASSEMBLY AND ASSEMBLY OPERATING DEVICE 6 4 OPERATING DEVICE 4F0AX00 Hydraulic piping...
Page 230: ......
Page 232: ...TROUBLESHOOTING 5...
Page 287: ...Other 6...