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Transm. Clutch pres. low warning on Cat M316C

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Throttle74

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Oct 21, 2021
Messages
9
Location
UK
Hi
We have a Cat M316C with a warning on the dash saying Transm. Clutch pres. low
The machine only has 5.5k hours so there’s no big usage on it.

I’ve changed the fluid thinking it might be the problem but it’s still there the warning :( I’ve put a gauge on the pilot and steering and got low revs 38.9 bar and high revs 63.7

Anyone had this fault with possible fix to it ?
 
T

Throttle74

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Oct 21, 2021
Messages
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Thanks for the reply back my notifications email had gone to junk email :rolleyes: hence my late response back.

I’ll get the serial and post it.
 
Nige

Nige

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First you need to check Pilot Pressure. See attached. Don't go adjusting anything yet, just check it and report back the result in psi please.

There are two possible methods for checking transmission pressures but I don't know which one applies to your machine.
Attached are both of them. Use whichever one suits your particular transmission arrangement. Post back the results.
All the specifications are attached,
 

Attachments

  • Pilot Pressure.pdf
    230.7 KB · Views: 5
  • T&A Specifications.pdf
    218.8 KB · Views: 4
  • RENR5567 Pressure Tests.pdf
    220 KB · Views: 4
  • RENR9125 Pressure Tests.pdf
    258.6 KB · Views: 4
T

Throttle74

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Oct 21, 2021
Messages
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Location
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Thanks for them I’ll check them out and come back too you :) we did stick a pressure test on yet just on idle 38.9 bar and on revs 63.7 but I’m not sure what travel mode it was on and wasn’t pressing anything such as travel pedal etc when we got them pressures.

It stops if we press the parking brake button yet still can’t travel then obviously, pedal has no effect on the warning going off though.
 
Nige

Nige

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I'm going to suggest something else having thought a bit about this. There is an accumulator in the brake system that could cause all sorts of shenanigins if it is not fully charged. Try this...........

Turn the engine start switch key to the ON position.
If the accumulator is not at normal operating pressure, the monitor will display a "BRAKE PRESSURE LOW" warning.
Start the engine. Run the engine for two minutes in order to fully charge the accumulator.
At this point the warning message on the monitor should have turned off.
Stop the engine. Turn the engine start switch back to the ON position.
Apply the service brakes by pressing the pedal fully down and then release. Continue to do this until the "BRAKE PRESSURE LOW" warning comes on again. Count how many cycles of the brake pedal it takes to generate the low pressure warning.
 
T

Throttle74

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Thanks for your help Nige it’s very much appreciated :) and no idea on the diagnostics codes i never knew there even was any.

I’ve seen it on never generation cat machines yet didn’t know it existed on ours I’ll search the menus if there is any in there.
 
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Throttle74

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Also I’ve not seen a “brake pressure low warning” yet i turn the ignition and soon after start the machine to which it says something like “level checking cancelled” i think

it’s just the warning about “Transm. Clutch Pres. low” that we get.
 
Nige

Nige

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Throttle74 said:
Also I’ve not seen a “brake pressure low warning” yet i turn the ignition and soon after start the machine to which it says something like “level checking cancelled” i think
Click to expand...
If the brake accumulator is working as it should then you ought not to get that warning at key on under normal circumstances. However I'd still like yo to do the test and count how many pumps of the brake pedal it takes to activate the warning.

Meantime we have to figure out a way of checking the transmission and implement pilot accumulators.
 
Nige

Nige

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Throttle74 said:
i turn the ignition and soon after start the machine to which it says something like “level checking cancelled” i think
Click to expand...
Throttle74 said:
no idea on the diagnostics codes i never knew there even was any.
Click to expand...
The attachments might help you somewhat, especially regarding the "level checking cancelled" message.
I need to find out what the password is to get into the "Active Error" menu...........

I take it you don't have an Operation & Maintenance Manual for it.? You really need one, It'll probably be the best 35 quid you ever spend. It can be downloaded in pdf form from t'interweb. "How to" instructions are available if you want them.
 

Attachments

  • M316C Monitor System.pdf
    232.2 KB · Views: 3
  • Diagnostic Codes.pdf
    184.3 KB · Views: 3
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Throttle74

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Thanks i'll try it out tomorrow your suggests tomorrow and yes we have the operation & maintenance manual we have the paper one which cost a fair bit more than £35 :(
 
T

Throttle74

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Oct 21, 2021
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I’m just updating my post incase anyone else has the same problem as i had, the fault was the parking brake solenoid coil.

This is on the accumulator block which is behind the cab under the steps.
 
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