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1.
Engage:
Insert the male buckle through the slot in the female buckle. Tighten the harness strap so that the male
buckle is flush against the female buckle.
2.
Disengage:
Loosen the harness strap so that the male buckle separates from the female buckle. Once separated,
pull the male buckle out through the female buckle.
3.
Adjust:
Turn and hold the buckle 90 degrees from the harness strap. To shorten webbing, pull down on the
adjustment strap. To lengthen webbing, pull upwards on the buckle.
Figure 8C - Pass-Through Buckles
3.7
USING THE ADJUSTERS:
3M Harnesses are equipped with a pair of adjusters for modifying the shoulder straps. See
Figure 9 for reference. See Figure 1 for which adjuster types are on your harness.
A. REVOLVER ADJUSTERS (FIGURE 9A)
1.
Tighten:
Rotate the ratchet knob towards your body to tighten.
2.
Loosen:
Pull the ratchet knob out, then rotate the knob away from your body to loosen.
Figure 9A - Revolver Adjusters
B. PARACHUTE ADJUSTERS (FIGURE 9B)
1.
Adjust:
Turn and hold the adjuster 90 degrees from the harness strap. To shorten webbing, pull down on the
adjustment strap. To lengthen webbing, pull upwards on the adjuster.
2.
Store:
Place the strap keeper at the end of the adjustment strap to secure.
Figure 9B - Parachute Adjusters
3.8
INSTALLING A HARNESS-MOUNTED SRD:
Harness-mounted SRDs are secured directly to harnesses by means of a
harness interface. Harness interfaces are a type of connector specially designed for this purpose. In general, there are
two types of harness interface: straight-pin and carabiner. Instructions for each style are provided below.
;
Instructions may vary per harness interface model. For more information on how to use your harness interface, see
the manufacturer instructions for the harness interface or for the product it was provided with.
;
Do not remove the backplate from the harness when installing a harness-mounted SRD.
A. STRAIGHT-PIN INTERFACE:
Straight-pin harness interfaces include a locking pin for securing to the harness.
Straight-pin interfaces may be used with Single-SRD or Twin-SRD formats, depending on the harness interface used.
See Figure 10A for reference.
1. Press both Locking Buttons (A) on the front of your harness interface to open. With the Locking Buttons held
down, remove the Locking Pin (B) from the harness interface.
2. Thread the Locking Pin (B) behind both Harness Straps (C), capturing the straps as you reinsert the pin into the
harness interface. An audible click should be heard when the Locking Pins are reengaged.
3. Verify that the harness interface is secure and that both Harness Straps (C) are captured by the harness interface.
B. CARABINER INTERFACE:
Carabiner interfaces are carabiners that function as harness interfaces. Carabiner
interfaces may be used with Single-SRD or Twin-SRD formats, although methods will vary slightly. See Figure 10B for
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