DIFFICULTY IN RAISING UNIT TO PLAYING POSITION
(REFER TO DETAIL “L”)
1. Loosen (turn clockwise) the two jam nuts (A) approximately six (6) turns.
2. Loosen (turn counterclockwise) the two jam nuts (B) approximately one (1) turn.
3. Tighten (turn clockwise) jam nuts (C)
no more than two (2) turns
.
4. Carefully raise unit to the playing position and check static position (refer to Detail “L”). Should it be necessary to
tighten springs further, carefully raise unit and lock in the up position before proceeding.
5. Repeat Steps No. 3 & 4 until folding action of backstop functions properly.
6. Re-tighten jam nuts A & B securely to lock jam nut C in position after final adjustment has been made.
DIFFICULTY IN LOWERING UNIT TO STORAGE POSITION
1. Loosen (turn clockwise) the two jam nuts (A) approximately one (1) turn.
2. Loosen (turn counterclockwise) the two jam nuts (B) approximately six (6) turns.
3. Loosen (turn counterclockwise) the two jam nuts (C)
no more than two (2 turns
.
4. Carefully raise and lower unit and check the static position (refer to Detail “L”). Should it be necessary to loosen
springs further, carefully raise unit and lock in the up position before proceeding.
5. Repeat Steps No. 3 & 4 until backstop functions properly.
6. Re-tighten jam nuts A & B securely to lock jam nut C in position after final adjustments have been made.
ADDITION OR REMOVAL OF SPRINGS
If springs need to be added or removed from the unit, the spring carriage must be disconnected from the base
frame.
1. Raise the unit to the upright position and lock the unit securely in place.
2. If a motor is attached, disconnect the motor from the motor mounting arm which is connected to the rear mast
weldment.
3. Place a protective barrier (i.e. cardboard, towel, etc.) under the spring carriage between the castors; this will help
to protect the floor from damage.
4. Loosen (turn counterclockwise) the two jam nuts (B) to the end of the thread of the tension stud.
5. Loosen (turn counterclockwise) the two jam nuts (C) until they are flush against the jam nuts (C).
6. Remove the nuts and lock washers which attach the eye bolts to the back plate of the frame to detach the rear
spring bar and lower it to the floor.
7. Remove each of the tension stud pins and the cotter pins to detach the forward spring bar and lower it to the floor.
8. Remove the hair pin cotter pins and large washers on each end of the rear spring bar.
9. Remove the tension studs from the forward spring bar by first removing the jam nuts (B’s and C’s), lock washers,
and washers.
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7/23/2018
INST1835
Page 21 of 39
1835 Portable Basketball Backstop
Installation, Operation, and Maitenance Manual
Spring Adjustment
