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Coolant filter
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whatscooking View Drop Down
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Joined: 08 Oct 2017
Location: Indiana
Points: 229 		Post Options Post Options   Thanks (0) Thanks(0)   Quote whatscooking Quote  Post ReplyReply Direct Link To This Post Topic: Coolant filter
    Posted: 14 Jun 2026 at 4:31pm
Does a 3500 1968 D21 have a place to put a adapter to fit a coolant filter to?
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 2026 at 8:38pm
Use the correct coolant and a water filter isn't needed. Yes. You can get one from a 7060 hung on there.
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whatscooking View Drop Down
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Joined: 08 Oct 2017
Location: Indiana
Points: 229 		Post Options Post Options   Thanks (0) Thanks(0)   Quote whatscooking Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2026 at 5:10am
Correct is green?
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 9196 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2026 at 11:17am
Red heavy duty diesel engine coolant is best. Drain and rinse out green. They don't play well together...red and green
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Joined: 21 Dec 2015
Location: WC Iowa
Points: 1025 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KJCHRIS Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2026 at 8:21pm
As already said, use the newer H D Longlife coolant approved for Diesels; Cummins, Detroit, Cat, Navistar and forget the filter. (FYI, most are just a cake of slow release additive). 
 Drain old coolant from engine, radiator, cab heater, flush thoroughly and refill with new. 
AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,
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whatscooking View Drop Down
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Joined: 08 Oct 2017
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Points: 229 		Post Options Post Options   Thanks (0) Thanks(0)   Quote whatscooking Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2026 at 9:41am
As I inch closer to getting my tractor back together I do want to put the proper liquids back in. This heavy duty coolant from NAPA says in the description that it is pink? Just checking.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 23482 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2026 at 10:27am
Pinkish/reddish....yes.
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whatscooking View Drop Down
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Points: 229 		Post Options Post Options   Thanks (0) Thanks(0)   Quote whatscooking Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2026 at 10:45am
Since I'm going to NAPA anyway is there a particular name i look for as far as the hydraulic/transmission oil? This tractor has PTO and lift arms so I see 27 gallons. Hope to get a little break on price but probably not.
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DSeries4 View Drop Down
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Joined: 12 Sep 2009
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Points: 7714 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2026 at 2:40pm
Originally posted by whatscooking whatscooking wrote:

Since I'm going to NAPA anyway is there a particular name i look for as far as the hydraulic/transmission oil? This tractor has PTO and lift arms so I see 27 gallons. Hope to get a little break on price but probably not.

Check that it meets AGCO 821 specs.
'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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