The next image illustrates the AutoPark parking brake lever relay technique with optional pedal brake which is discovered only on coaches constructed amongst about mid 94 to mid 98.
the normal shut-off degree, and the motor is simply stalling beneath the abnormal load. In the event the motor stalls, the current placed on it truly is drastically amplified – – This extraordinarily large present-day will trigger higher temperatures while in the motor, which subsequently will vacation the thermal overload safety swap that is definitely crafted into your motor. The motor will cease wanting to operate assuming that the thermal switch is tripped – – BUT, just after a couple of minutes or so, the motor will awesome adequately to enable the thermal protector to RESET.
So – – Assuming the cables on their own are in excellent condition, this leaves our remaining variable to get the long hex nut around the actuator shaft – – depicted as #1 during the illustration previously mentioned. It is critical to note this actuator is shown during the BRAKE ON issue – – Try out TO VISUALIZE IT Together with the SPRING COMPRESSED within the BRAKE OFF situation. While using the brake OFF as well as the actuator shaft prolonged to its mechanical limit, we would want to adjust the long hex nut just to the point where there was no slack from the cable process – – no a lot more, no a lot less. If we then take away the hydraulic pressure through the actuator, the spring will increase, and the piston and shaft will transfer to the proper – – making use of the brake. Which means that the brake lever from the drum will move about an inch, the cable visiting the lever relay will go in regards to the identical inch, the cable likely Through the relay into the actuator will transfer about one.
Explanation: Each of the GM literature claims you don’t dare work on these actuators because the spring in them is rather solid, and any time you choose them apart matters may possibly fly all over hell and injure an individual. Legitimate more than enough should you don’t know what you are doing. BUT, Here's what you are able to do – – You could compress that spring and cage it (retain it compressed) BEFORE you go ahead and take actuator aside. This is certainly done by just turning that #three nut to the ideal, up from the actuator housing, until finally you've the spring compressed – – by advantage of the nut pulling the shaft on the remaining.
two. The RGS has long gone undesirable and has turned over the pump Along with the AutoPark light. Strain will go thru the roof and soon rupture the RGS or Another part. Then, the brake will mechanically use.
The pump will remain off until eventually the strain has dropped to 1200 psi or decreased, after which you can it is going to cycle along with the pressure operates back again approximately 1600 psi. This Hello pressure is necessary to RELEASE the parking brake Therefore the mentor can roll.
Conference all of these demands is mostly a type of balancing act, and will be considerably difficult to understand and accomplish.
To polish off this presentation, we’d choose to teach you what we come to feel would be the nicest Genie Lamp set up Now we have seen.
The following website page illustrates The essential Procedure of your actuator, which is actually the “heart†from the AutoPark procedure.
Generally, when the gear shift lever is moved from PARK to Various other position (reverse, generate, neutral), the RGS will swap the pump on right up until the procedure stress reaches 1600 psi and after that the RGS will go to the open Get in touch with ailment, and shut the pump off.
2. A second solution for the people with the lengthier arms plus much more agility, could well be to placed on some latex gloves, and daub the grease on with your fingers. This might need the benefit of being able to come to feel the varied elements of the cam/switch when you smear the grease in and round the assembly.
So exactly what is the Rotten Eco-friendly Switch, and Exactly what does it do? The RGS is An electrical stress switch, which controls the Try here hydraulic pressure supplied for the actuator. It's intended to turn on the pump at pressures underneath 1200 psi, and turn the pump off when the force reaches 1600 psi.
4. Test the procedure to make certain that the footwear aren't dragging inside the “brake launched†condition, and the AutoPark (PARK place over the gear shift lever) will sufficiently keep the mentor on an incline.
With the above part amount, It's also advisable to have the capacity to drop by a decent automobile elements retailer like NAPA or CarQuest, and have them purchase it on an overnight foundation. They might ought to know that this is the GM component quantity so they can do a cross-reference.