Installation Guide

CURTMFG.COM
•
PRODUCT SUPPORT: 877.287.8634
•
17500-INS-RD
•
12/08/2021
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ECN8701
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PAGE 2
Step 1 - Determine your spring bar width setting
TruTrack
™
is designed to work in two neutral spring bar settings to
fit most A-frame trailers. The spring bars can easily be repositioned
in the 30° or 70° position (+/-5°). For narrow frames (50° and less)
no adjustment is needed as it comes preset in the narrow setting.
For wider frames (over 50°) adjustment is needed.
Step 3 - Install the sockets back into the head
Once the cam block has been adjusted, lightly coat the balls with
grease and set into the ball sockets. Flip the socket upside down
and position it so the balls are resting in the cam block recesses.
Hold the socket in place and insert the carriage bolt through, making
sure the bushing is still in it's correct position. Reinstall the spring,
bushing sleeve and castle nuts.
Torque castle nuts to 75 lb-ft. and reinstall the cotter pins.
Grease with white lithium grease in the zerk when finished.
Step 2 - Adjust the cam blocks
To change the neutral angle of the spring bars, the cam block will need
to be adjusted. To adjust the cams, remove the cotter pins from the
castle nuts. Remove the castle nuts, bushing sleeves and springs.
Remove the carriage bolts from the top while holding the socket in place.
With the head resting upside down, carefully remove the socket with
the bushing and balls. Looking at the cam block in the head, pull the
cam block out and rotate it outward to the next position as shown.
Top view
Angled view
Preset position (narrow)
Preset position (narrow)
Adjusted position (wide)
Adjusted position (wide)
70°
30° (preset)
SPRING BAR WIDTH ADJUSTMENT
Castle nut
Spring
Bushing sleeve
Cam block
Carriage bolt
Cam blocks are
located on the under
side of the head
Socket
Bushing
Balls
Cotter
pin