Actuator – – Discovered on all AutoPark methods. A hydraulic cylinder that is certainly seriously spring loaded. The spring applies the parking brake, and the hydraulic cylinder when pressurized, releases the parking brake.
Within the upper drawing, the hydraulic force has completely compressed the large spring within the actuator. As such, the actuator shaft has moved as far for the left as feasible.
The trouble: For a number of yrs, we are already hearing about an issue that includes shifting from PARK to REVERSE – – In the event the change lever is moved out of PARK, the AutoPark program is imagined to launch the parking brake, and permit the coach to roll. However, it turns out the switching system which makes this feasible (called the “the equipment shift lever position swapâ€), does not normally accurately feeling the change lever position.
is situated above the star wheel. The port just isn't while in the backing plate as it had been within the old family members automobile.
This illustration displays how the configuration with the red lever influences the cable motion. The geometry of this setup is this sort of that In case the blue cable moves about an inch, the purple cable will transfer about an inch and 1 / 4. This is vital to keep in mind in any discussion of actuator travel.
About the Edition II and Model III AutoPark programs, You will find there's relay within the circuit whose work it's to hold the relatively superior present-day drawn through the pump motor. Whilst not all of the techniques use the exact same portion range to the relay, in each situation of which we are mindful, it really is a fairly garden-range kind of automotive part.
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If your AutoPark lite stays ON, and particularly When the pump won't shut off, locate the RGS and find Try here out whether it is oily. Pull the wire connector off of the RGS, and find out if there is oil Within the connector. When there is, you need Examine no further more – – it's negative.
These days we’ve witnessed a big boost in the stories of J71 Car Park braking brake devices with leaking actuator cylinders. For several years, this malfunction has become Pretty much unheard of, but in the last six months They can be appearing with disturbing regularity.
The pump will stay off until eventually the stress has dropped to 1200 psi or decrease, and afterwards it'll cycle along with the force operates again up to 1600 psi. This hi tension is required to RELEASE the parking brake Therefore the coach can roll.
Someday all through 2001, the pump, relay and solenoid have been moved to a locale under the entrance utility hood, to the driver side on the radiator.
 In case you have experienced a leaking actuator and have experienced us (or someone else) repair it, You will find there's really superior probability that the technique has lots of contamination and crud in it.
Poppet Valve – – A A method valve which is found inside of a fitting slightly below the RGS. It is well and sometimes shed when getting rid of the hex retainer that keeps it in place.
The following displays some diagrams and supporting details on exactly what the brake assembly seems like: