-
Forum
-
Antique Caterpillar Machinery Owners Club
-
DISCUSSION
-
D9 convert from torque converter to direct drive
D9 convert from torque converter to direct drive
Less
More
-
Posts: 173
-
Thank you received: 35
-
1 month 3 weeks ago #259504
by clayton
Well made the mistake of going and looking at a D9 19A and I can’t justify getting it other than I want it! I’m looking to replace the torque converter to direct drive wondering if anyone has a parts machine D9 18A, I need from the flywheel back to transmission or last resort a good used torque converter for a 19A but would much rather make it direct drive, wondering if anyone on here has done this and what problems they had found thank you for any assistance.
The following user(s) said Thank You:
Fat Dan
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 664
-
Thank you received: 121
-
1 month 3 weeks ago #259512
by PhilC
I don't know about the D9's but I think the D8 torque convertor drive has a longer chassis compared to the direct drive.
944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 235
-
Thank you received: 123
-
1 month 3 weeks ago #259514
by brian18a
The case and engine frame assembly according to parts book and NPR are different for 18A and 19A. No clue what specific differences are. If 19A is longer would not be impossible to convert, would need longer drive shaft from clutch to transmission. Unless there is something that would make oil clutch interfere with something in frame design.
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 6893
-
Thank you received: 657
-
1 month 3 weeks ago #259515
by neil
Hi Clayton, if it worked out, would this tractor have a clutch and a 3-speed powershift? Reason I ask is that the D8LSA is almost that. It has an hydraulically-operated two-speed clutch (direct and underdrive) coupled to the 3-speed powershift, giving it 6 speeds forward and reverse. The other thing is that if you did manage to build it, that would give an option to other 19As that need unavailable torque convertor parts (I don't know if parts are available, but if they aren't, this would be a potential lifeline for those tractors)
Cheers,
Neil
Pittsford, NY
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 235
-
Thank you received: 123
-
1 month 3 weeks ago #259517
by brian18a
No it would have a manual oil clutch and a gear drive manual transmission. Very much like 14A and 36A D8s.
The following user(s) said Thank You:
neil
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 173
-
Thank you received: 35
-
1 month 3 weeks ago #259519
by clayton
Hi Neil yes Brian18a is correct it would not have any sort of power shift to it. The under carriage is in great shape actually the entire machine is in great shape except for the torque converter being bad .
The following user(s) said Thank You:
neil
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 1006
-
Thank you received: 141
-
1 month 3 weeks ago #259524
by Wombat
Not sure what you want to do with the tractor, if you replaced the converter/clutch assembly with an oil clutch, you then have a 3 speed direct drive with a first gear slightly faster than 4th gear in a direct drive 18A.
Wombat
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 173
-
Thank you received: 35
-
1 month 3 weeks ago #259530
by clayton
Wobat it’s too good of a tractor to go to the scrap yard but I have been unsuccessful at finding a used torque converter and was trying to find other options to make it operational again. So if I were to make it direct drive is the gear ratio in the transmission difference in a 18A versus a 19A or is the torque converter somehow slowing the output shaft down?
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 235
-
Thank you received: 123
-
1 month 3 weeks ago #259531
by brian18a
completely different transmissions. Torque converter is 3 speed, speeds controlled by engine rpm load and torque converter output rpm. as load increases speed decreases for a given engine rpm. Provides a fairly large range of tractor speed for each transmission gear.
18A direct drive is a six speed transmission. A manual transmission has a narrow band of tractor speed for each gear.
To make an usable tractor, one would need to replace 19a transmission.
Please Log in or Create an account to join the conversation.
Less
More
-
Posts: 235
-
Thank you received: 123
-
-
Forum
-
Antique Caterpillar Machinery Owners Club
-
DISCUSSION
-
D9 convert from torque converter to direct drive
Time to create page: 0.180 seconds