Hydro-Gear 2800 Service Question .. Getting mixed info

7394 said:
Is it better to have the hydros hot or cold to drain the fluid & change filters.
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The service manual doesn’t specify either way. I don’t think it matters. Once you remove the filters, the oil spills out easily.
 
OK Thanks, I have "Internal expansion tanks" on my HG 2800s' & I drained a precisely measured 118 oz combined total of OE 20w-50. (yes I'm that **** to measure the drained oil),.

Research states about 2 quarts per unit on my application.
 
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You got to remember the oil filters contains some oil.

Also you need the Hydro-Gear dual barb fitting, part number 55752 to refill the oil. Or at least it makes it easier.
 
StarTech said:
You got to remember the oil filters contains some oil.

Also you need the Hydro-Gear dual barb fitting, part number 55752 to refill the oil. Or at least it makes it easier.
Click to expand...
Absolutely, & that accounts for the extra missing.

Yes I have that blk dual barb fitting, or you can just open the very top fill caps & side oil level caps.
I used the fitting. I filled them to full level. .. Letting it sit a couple nights, & then check levels & start purge process.
 
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OK, so in continuing. I have added new (oe) H/G oil filters & using the dual barb fitting added fluid. I could only get
all but 16 ounces in of a gallon on 2 internal expansion 2800 units. Let it sit 2 days. Checked fluid level & it was to level.

Then with dump valves released, started it, rear off the ground & at low rpms run the sticks slowly 6 times times. Stopped it, leveled it on blocks & then checked fluid levels, they both wanted more fluid in each.

Now I am about 10 oz short of 1 gal total. & will have more purging to keep doing maybe tomorrow.

Any advice would be greatly appreciated.. These are my 1st serviceable hydros.
 
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