Specifications

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SERVICING THE EMERGENCY LEVER
If emergency lever (#11) of actuator is applied, it can be disengaged by using a screwdriver to lift upward on front of flat
emergency lever spring (#10) while pulling lever forward until released. A thorough inspection of emergency lever,
emergency lever spring, and safety cable is required. Damaged parts must be replaced as follows:
A. Remove Cable (#27) from emergency lever (#11), emergency lever guide (#6) and flat emergency lever spring
(#10), then pull lever out of actuator outer case (#23) through cross-slot in top.
B. Install new emergency lever through cross-slot in top of outer case. Attach new emergency lever spring and emergency
lever guide.
C. Bolt emergency cable to emergency lever using bolt & locknut, leave loose to allow fork to pivot on lever.
D. Add adequate brake fluid to master cylinder and bleed brake system per instructions 4-6 in installation section.
Actuator Trouble Shooting Guide
Symptoms Possible Solutions
Brakes Locking Up
Emergency lever partially pulled Release emergency lever.
(Lever must be in green zone).
(Emergency cable must have slack)
Debris in master cylinder orifice Clean/flush or replace orifice
Debris/rust in master cylinder Clean/flush or replace master cylinder
Pinched brake line or hose Replace brake line or hose.
Brake cluster hanging up Inspect wheel cylinder for rust and proper function
Check for broken springs
Check shoe adjustment (too tight)
Cluster mounting bracket bent
Trailer must be level or parallel with ground
Master Cylinder Not Priming
Master cylinder lever will not pump fluid Slide tube must be completely extended
Check fluid level.
Master cylinder orifice plugged Clean/flush or replace master cylinder
Brake fluid does not come out of orifice Clean/flush or replace orifice
Brake fluid does not come out of brake line Inspect line/hoses for blockages.
Air in brake lines Check all line connections for air leaks
Check fluid level and bleed brakes
Leaking Master Cylinder
Brake fluid leaking out of pushrod area Repair or replace master cylinder.
Brake fluid leaks out of gasket area Damaged gasket. Replace gasket.
Tighten master cylinder bolts in an alternating sequence
(10 inch lbs. torque)
Brake fluid leaks out of gasket area Master cylinder tightened unevenly.
Replace gasket and tighten bolts alternating sequence.
Do not overfill master cylinder
Brake fluid leaks around orifice When attaching main brake line to orifice, use line
wrench and back-up wrench to prevent over-tightening
or damage to threads in master cylinder.
Brake Testing
Jack trailer wheels up off ground. DO NOT LUBRICATE SLIDES
Spin wheel/wheels. Wheels should spin freely.
Pull emergency lever on as far forward as possible,
wheels should not turn by hand. Release emergency lever.
Wheels should spin forward without resistance.
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4010 320th St.
P.O. BOX 189, BOYDEN, IA. 51234
PH: [phone] FAX: [phone]
TOLL FREE: 1-800-54DEMCO (1-800-543-3626)
www.demco-products.com
Rue Ring Installation
To install Rue Ring, place straight wire of Rue Ring through hole in pin as
shown in illustrations ( Figure B 1- 2)
Next, using a pliers, twist end of Rue Ring so the straight wire crosses over top
of the bent wire. ( Figure B 3)
Figure B illustration 4 shows removal of Rue Ring. Uncross wires, then while
lifting the bent wire, pull on loop end of the Rue Ring to remove from pin.
Locked
Pin installed.
Bent leg behind
straight leg.
Lock position
Bent leg must
be on top of
straight leg then
push up & back.
TO REMOVE
Figure A
Figure B
* Required for safe operation.
Install into hole.