Demco 500 SS, Руководство оператора, Страница: 17 / 28

AG20046 Page 17
hitching the wagon
5. Be sure Pin and hitch rating is equal to or greater than
the wagon GVWR.
6. Connect the emergency chain hook to the towing vehicle
and plug in the lights.
.
7. If the emergency brake lever is accidentally applied
while unhitching, release the lever by pulling it forward
and with a screwdriver lift up the front of the flat spring
until it releases the lever. Many times these parts are
damaged when this happens. An inspection of the lever,
flat spring, and chain with S-hooks is required and any
damaged parts must be replaced.
Loosen the bleeder valve one turn and pump the master
cylinder until the air bubbles stop coming out of the
hose in the glass container, then close the bleeder valve
and repeat the process on the other wheels. (Watch
the fluid level in the master cylinder and refill so level
does not fall below 1/2 full). Refill master cylinder every
4 or 5 strokes. Dispose of contaminated brake fluid
according to local regulations.
4. After bleeding is completed, refill the master cylinder
and put the filler cap on securely . Replace the flat
spring behind the emergency lever.
To test the brakes use a wrench or vise grip and clamp
onto the top of the emergency lever to lengthen it. Pull
lever forward until lever locks on the second click. The
lever should be approximately straight up and down.
Now try to rotate each of the four wheels in a forward
rotation. You should not be able to rotate the wheels
forward. If you can, then release the emergency lever
by wedging a screwdriver under the flat spring behind
the lever and set each wheel brake adjustment up 2 or
3 notches. Then repeat the test procedure.
BRAkE MAintEnAnCE
1. Before towing check to be sure master cylinder is full of brake fluid and check lines for leaks. Inspect the actuator
for bent or worn parts. Replace parts if necessary. Make sure the actuator mounting bolts are tight.
2. Periodically check braking quality, as described above. Failure to do so can result in loss of braking.
3. If units are used in corrosive conditions the actuator and wheels should be washed out with high pressure water.
When actuator parts are dry, oil all moving parts.
REPlACinG thE EMERGEnCy lEvER
Step one: Remove the lever guide and flat spring. Take the S-hook off the lever, take the lever out from the in-
side.
Step two: Install the new lever from the inside and up through the slot. Replace the new flat spring and the lever
guide. Replace the push rod and master cylinder and new gasket.
Step three: Take the new chain and fasten the S-hook to the lever by squeezing the hook shut with a pliers. Check
the master cylinder and fill with DOT 3 or 4 brake fluid.
Step four: Re-bleed brake system
.
REPlACEMEnt PARtS AnD MAintEnAnCE
BRAkE SyStEMS