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Merlo Hydraulic Oil

Hjwise

Member
Mixed Farmer
The hydraulic pump on my 32.6 is quite noisy until it warms up on these cold mornings we are having. Level is fine and oil and suction filter are fairly fresh. Does anyone use 32 instead of the 46 (I currently use 46)? No doubt we’ll get a freak heatwave if I change the oil.
 

icanshootwell

Member
Location
Ross-on-wye
The hydraulic pump on my 32.6 is quite noisy until it warms up on these cold mornings we are having. Level is fine and oil and suction filter are fairly fresh. Does anyone use 32 instead of the 46 (I currently use 46)? No doubt we’ll get a freak heatwave if I change the oil.
Do you leave machine to warm up 1st before operating, I probably leave mine 10 mins in this cold weather .
 

Hjwise

Member
Mixed Farmer
I leave it while I close up the pig gates (5 minutes). I don’t think it warms the oil up a great deal until I start using the boom though. I don’t think it used to be as loud - maybe another issue?
 

Mur Huwcun

Member
Livestock Farmer
Location
North West Wales
Does it not have a CCLS system like most other things therefore if it idled in the yard all day as it’s not pumping much if any oil around it wont warm up much other than what the gear/charge/steering pump circulates? Obviously you shouldn’t thrash it when cold but it needs 5mins to warn the engine then drive it steadily for next 5-10 mins.
 

Hjwise

Member
Mixed Farmer
Does it not have a CCLS system like most other things therefore if it idled in the yard all day as it’s not pumping much if any oil around it wont warm up much other than what the gear/charge/steering pump circulates? Obviously you shouldn’t thrash it when cold but it needs 5mins to warn the engine then drive it steadily for next 5-10 mins.
It’s not moving much oil with just the engine. Only makes the noise when moving the boom or using the third service. After ten minutes of proper work back to the normal sound.
 

Hjwise

Member
Mixed Farmer
I would say so. Mine started doing it with cold oil, it was just a loose clip on the hose from the tank to the pump. Worth checking first, try twisting the hose and see if it turns at the ends, if it does just tighten the clips up or fit new ones.
I’ll check tomorrow. Thanks.
 

x121x

Member
Just worth a check that the hydraulic filter in the tank isn’t sitting directly bellow the return, it used to cause the suction filter to draw the bubbles from the return and give you a kinda cavitation noise.
 

Hjwise

Member
Mixed Farmer
I think earlier comments of sucking air are correct. I’ve tightened the clips on the suction pipe and ordered a new one (as it feels softer than I think it should be) - could it be collapsing when the oil is cold? I haven’t investigated in the tank yet but I assume there is a pipe that that drops down lower in to the oil - so another potential point for air to get ?
 

x121x

Member
I think earlier comments of sucking air are correct. I’ve tightened the clips on the suction pipe and ordered a new one (as it feels softer than I think it should be) - could it be collapsing when the oil is cold? I haven’t investigated in the tank yet but I assume there is a pipe that that drops down lower in to the oil - so another potential point for air to get ?

Just check in the tank on some occasions the pipe inside the tank could soften and start to collapse and restrict oil flow.
 

Hjwise

Member
Mixed Farmer
Just check in the tank on some occasions the pipe inside the tank could soften and start to collapse and restrict oil flow.
I’ve just ordered a new bit of pipe. Apparently there’s a gauze filter on the end of it, which I had no idea of. I’ll have the joy of changing it tomorrow.
 

Chuckie

Member
Location
England
I’ve just ordered a new bit of pipe. Apparently there’s a gauze filter on the end of it, which I had no idea of. I’ll have the joy of changing it tomorrow.

Connect to a large tipping trailer and tip it to get rid of most of the oil from the tank, makes the job easier!
 

Hjwise

Member
Mixed Farmer
Connect to a large tipping trailer and tip it to get rid of most of the oil from the tank, makes the job easier!
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That got the level down a bit.... the problem was a blocked suction filter. Somehow need to clean the tank out after draining.
 

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Webinar: Expanded Sustainable Farming Incentive offer 2024 -26th Sept

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On Thursday 26th September, we’re holding a webinar for farmers to go through the guidance, actions and detail for the expanded Sustainable Farming Incentive (SFI) offer. This was planned for end of May, but had to be delayed due to the general election. We apologise about that.

Farming and Countryside Programme Director, Janet Hughes will be joined by policy leads working on SFI, and colleagues from the Rural Payment Agency and Catchment Sensitive Farming.

This webinar will be...
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