![background image](http://html1.mh-extra.com/html/gehl/1448-plus/1448-plus_operators-manual_2205866072.webp)
918215/CP0407
68
Printed in U.S.A
TROUBLESHOOTING
1448 PLUS
DRIVE AND MAIN CONTROL VALVES
Transverse cracking
(checking)
See Causes 1-4, 6
Mat shoving under roller
See Causes 1-4, 6, 9, 13
Bleeding or fat spots in mat
See Causes 3, 4, 6, 13
Roller marks
See Causes 1, 2, 6, 9, 10
Poor mix compaction
See Causes 1-4, 6, 9, 10, 12, 13
Problem
Possible Cause
Corrective Action
Incapable of maintaining the
load
Internal oil leak at the spool
Replace entire valve housing and spool
Oil leaking at relief valve port
Disassemble and clean or replace relief
valve
Load check poppet or seat damaged
(located inside sections)
Replace poppet and seat assembly
Spool sticking or does not
move
Hydraulic oil contaminated
Drain oil, replace with fresh oil
Replace filters
Valve clogged with dirt
Remove dirt and clean assembly
Inside of plunger cap filled with oil
Replace seal on end of cap
Restriction at spool internal stop
Remove restriction
Replace entire valve section and spool
assembly
Pressure too high
Adjust pressure
Lever or link bent
Remove and replace lever or link
Spool bent
Replace entire valve assembly
Return spring failing
Replace spring
Return spring or cap misaligned
Loosen, align and tighten spring or cap
System oil temperature distribution not
uniform
Allow sufficient warm-up for entire
system
Oil leaking at seals
Paint sticking at seal
Remove and clean the seal
Back-pressure in valve
Replace hydraulic oil filter
Dirt in seal
Remove and clean the seal
Seal plate has loosened
Replace valve housing as assembly
Seal broken or damaged
Remove and replace seal
Controls feel heavy
Foreign matter in control valve spool
Clean control valve
Valve spool sticking
Replace entire valve housing
Control linkage lacking lubrication
Properly lubricate linkage
Problem
Possible Cause
Corrective Action
Summary of Contents for 1448 Plus
Page 4: ...NOTES Courtesy of Machine Market...
Page 12: ...918215 CP0407 8 Printed in U S A INTRODUCTION 1448 PLUS NOTES Courtesy of Machine Market...
Page 16: ...918215 CP0407 12 Printed in U S A CHECKLISTS 1448 PLUS NOTES Courtesy of Machine Market...
Page 18: ...918215 CP0407 14 Printed in U S A CHECKLISTS 1448 PLUS NOTES Courtesy of Machine Market...
Page 25: ...Printed in U S A 21 918215 CP0407 SAFETY Continued L65924 137628 Courtesy of Machine Market...
Page 26: ...918215 CP0407 22 Printed in U S A SAFETY Continued NOTES Courtesy of Machine Market...
Page 56: ...918215 CP0407 52 Printed in U S A SCHEMATICS 1448 PLUS NOTES Courtesy of Machine Market...
Page 75: ...Printed in U S A 71 918215 CP0407 1448 PLUS TROUBLESHOOTING NOTES Courtesy of Machine Market...
Page 76: ...918215 CP0407 72 Printed in U S A TROUBLESHOOTING 1448 PLUS Courtesy of Machine Market...
Page 80: ...918215 CP0407 76 Printed in U S A DECAL LOCATIONS 1448 PLUS NOTES Courtesy of Machine Market...
Page 82: ...918215 CP0407 78 Printed in U S A INDEX 1448 PLUS NOTES Courtesy of Machine Market...