Gehl 1448 Plus, Operator'S Manual

Page: 71 / 84

Printed in U.S.A 67 918215/CP0407
1448 PLUS TROUBLESHOOTING
MATERIAL-DELIVERY, COMPACTION-RELATED MAT PROBLEMS
Mat texture not uniform See Causes 1, 2, 4, 7-9, 12
Screed marks See Cause 3
Screed not responding to
correction See Causes 2-4
Poor pre-compaction See Cause 2, 4
Poor longitudinal joint 13. Improper joint overlap Limit overlap to 2” maximum
Poor transverse joint See Causes 3, 4
14. Incorrect nulling of screed Increase “pitch” of screed before starting
Problem Possible Cause Corrective Action
Problem Possible Cause Corrective Action
Wavy surface
(short waves - ripples) 1. Improper base preparation Review base installation
2. Improper rolling operation Decrease speed
3. Improper mix design (aggregate)
4. Improper mix design (asphalt)
5. Mix segregation Asphalt plant mixing too long
6. Variation of mix temperature Asphalt plant burners not heating
consistently
Wavy surface (long waves) See Causes 1, 5, 6
7. Trucks bumping finisher Stop truck short of paver and drive paver
to truck
8. Truck holding brakes Driver must apply brakes only as required
for the truck to stay “in Paver”
9. Reversing or turning rollers too quickly Cycle must be slow but deliberate
10. Parking roller on hot mat Move to cooler surface before parking
Park at 45
o
angle
Tearing of mat (full width) See Causes 3-7
11. Improper mat thickness Check that the mat thickness is twice the
size of the largest aggregate
12. Cold mix temperature Check with asphalt facility for hotter
asphalt mix
Mat texture
(center or outside streaks) See Cause 12
Mat texture (non uniform) See Causes 1, 3-6, 11, 12
Screed marks See Causes 7, 8
Screed not responding to
correction See Causes 6, 11, 12
Auger shadows See Causes 3-4, 5
Poor pre-compaction See Causes 1, 11, 12
Poor longitudinal or
transverse joint See Causes 2, 12
Courtesy of Machine.Market