hello miner here

[miner]

i have a m85p mahindra and a 7520 anyone having trouble with air cond on their cab tractor was wandering if it's 80deg outside what should cab temp be inside

 

[TBN Support]

Welcome to the TBN forum!

:welcome:

I'm going to move your thread on over to our Mahindra section to see if we can find you an answer. :tractor:

 

[Ed of all trades]

No idea about your tractor nut welcome to TBN Ed

 

[miner]

Thank you Cat

 

[Wagtail]

G'day Mate and welcome to TBN from Downunder.

Enjoy the site... especially now that Catherine has shifted you over to a more specific thread.

 

[brasco426]

Welcome Miner, I'm no diesel mech, but I am an HVAC Tech. The cab should be comfortable with the AC on with an outside temp @80. Should be able to get around 50 degrees out of the vents. Take a peak at the condenser coils to make sure they aren't packed with dirt and debris. However others will chime in soon. There is a Mechanic that frequents these threads and is a huge help (Jabonee) and I hope he don't mind the name drop. Daves Tractor is another big contributor and asset to Mahindra info. Good Luck in the mean time.

 

[Jabonee]

i have a m85p mahindra and a 7520 anyone having trouble with air cond on their cab tractor was wandering if it's 80deg outside what should cab temp be inside

Definitely check the condenser,evaporator and HVAC filter for blockage. Is the compressor turning? Is the fan running? Try/inspect these things first.:thumbsup:

 

[miner]

I've checked these but thinks Jabonee. I've had it a 2 different dealers it's still under warr. First said it had to much freon the other said not enough. Not sure what's going on

 

[rback33]

I've checked these but thinks Jabonee. I've had it a 2 different dealers it's still under warr. First said it had to much freon the other said not enough. Not sure what's going on

Both reasons will keep it from operating correctly...

 

[Jabonee]

I've checked these but thinks Jabonee. I've had it a 2 different dealers it's still under warr. First said it had to much freon the other said not enough. Not sure what's going on

I think my next step would be to find out if the dealers your dealing with are HVAC CERTIFIED. PSI to high or low will cause the compressor not to run. Other possibilities are heater control valve and mixing gate.:confused3:

 

[Navasot]

Im betting to much was let out... simple check of the gages will be able to tell whats happening... Havnt had much issues out of those ACs... its a much better system than any of their others

 

[Jabonee]

Im betting to much was let out... simple check of the gages will be able to tell whats happening... Havnt had much issues out of those ACs... its a much better system than any of their others

That s why I question the dealers. Gauges are only a diagnostic tool. Without looking up the spec I'm guessing the system holds 2 to 3 lbs. Did they evacuate the system and measure? I'm guessing not. The dealer that said it was high probably only saw a high reading and assumed there was too much. Thats bad because high psi can be caused by a bad expansion valve. Connecting to both high and low sides and making sure the psi is equal would be my first step. Then start the engine,observe the readings. Now shut it all off. You should see the pressures begin to equalize.If not the expansion valve may be bad or blocked. This leads me back to say, make sure the dealer you have is HVAC certified. :cold:

 

[miner]

That s why I question the dealers. Gauges are only a diagnostic tool. Without looking up the spec I'm guessing the system holds 2 to 3 lbs. Did they evacuate the system and measure? I'm guessing not. The dealer that said it was high probably only saw a high reading and assumed there was too much. Thats bad because high psi can be caused by a bad expansion valve. Connecting to both high and low sides and making sure the psi is equal would be my first step. Then start the engine,observe the readings. Now shut it all off. You should see the pressures begin to equalize.If not the expansion valve may be bad or blocked. This leads me back to say, make sure the dealer you have is HVAC certified. :cold:

Thank you Jabonee I'll check and see