LESSON 2 OF 10

Adjusting Spring Tension

YOU WILL BE ABLE TO

Perform spring tension adjustments on the MORryde Zero-G ramp door system.
Verify door behavior to determine if tightening or loosening the adjustment bolt is required.
Observe safety limitations regarding hook positioning to prevent spring disconnection.

TOOLS AT THE BAY

3/4" socket — Used to rotate the adjusting bolt clockwise to increase tension or counter-clockwise to decrease tension.
Socket wrench or ratchet — Provides the mechanical leverage needed to turn the 3/4" socket during adjustment.
Non-marring pry tool — Used to safely remove the covers over the adjusting bolts on both sides of the ramp.

How It Works

Mechanical Balance Principles

The Zero-G ramp door uses spring tension to offset the weight of the door. If the door is too heavy to lift, the spring tension must be increased. Conversely, if the door is too light or difficult to close, the spring tension must be reduced.

Adjustment Directionality

Tension is controlled by the rotation of the adjusting bolts. Clockwise rotation tightens the mechanism for a heavy door, while counter-clockwise rotation loosens it for a door that feels too light.

Hook and Plate Critical Clearance

The spring mechanism relies on a hook remaining engaged with the bolt plate. Loosening the adjustment bolt too far brings the hook into contact with the plate, which creates a risk of the spring disconnecting from the assembly.

Step-by-Step Procedure

0/5 done

1.Remove the covers over the adjusting bolts on both sides.
2.Use a 3/4" socket on the adjusting bolt.
3.Door too heavy: tighten (clockwise). Door too light: loosen (counter-clockwise).
4.Never loosen so far that the hook touches the bolt plate — the spring may disconnect.
5.Reinstall the covers.

Diagnostic Chart

Symptom	Check	Spec / Expected	Likely cause & fix
Ramp door feels excessively heavy to lift.	Operate the door and evaluate lifting effort after removing bolt covers.	Per the applicable manual	Insufficient spring tension requiring clockwise adjustment. Basis: MORryde Zero-G Ramp Door Spring Adjustment
Ramp door feels too light or difficult to pull down.	Operate the door and evaluate resistance to closing.	Per the applicable manual	Excessive spring tension requiring counter-clockwise adjustment. Basis: MORryde Zero-G Ramp Door Spring Adjustment
Spring disconnects from the assembly.	Inspect the position of the hook relative to the bolt plate.	Hook must not touch the bolt plate.	The adjusting bolt was loosened too far (counter-clockwise). Basis: MORryde Zero-G Ramp Door Spring Adjustment

At the Bay: Diagnose the Case

CASE 1 / 3

Ramp door feels excessively heavy to lift.

Test
Compare
Correct

Select the next check

Basis: MORryde Zero-G Ramp Door Spring Adjustment. A likely cause is a hypothesis; confirm it with the applicable service procedure before repair.

Common Bay Mistakes

✕ Loosening the bolt until the hook touches the bolt plate.
✕ Failing to remove the covers before attempting to turn the bolts.
✕ Rotating the bolt counter-clockwise when the door is already too heavy.
✕ Attempting adjustment with an incorrectly sized socket.
✕ Neglecting to reinstall the protective covers after adjustment is complete.

Quick Check

Practice only — not scored.

Which direction should you turn the 3/4" socket if the ramp door is too heavy to lift?

What is the primary danger of loosening the adjusting bolt excessively?

What is the first step in the MORryde Zero-G adjustment process?

Plan the Service Sequence

Adjusting Spring Tension

Planning practice only. Follow the applicable manufacturer's instructions, employer safety program and qualified supervision on real equipment.

Plan the first action. Compare the service steps with the bay mistakes.

Basis: MORryde Zero-G Ramp Door Spring Adjustment

Source: MORryde Zero-G Ramp Door Spring Adjustment

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