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john Deere LT 155 seems to travel fast enough until you go up a little incline. This incline is only 20-25 ft. There is not any belt to control this, Is It? It seems it is all hydraulic controlled. I know this mower is kinda old around 1998-2001 but it doesn't smoke at all, seems to have good compression. Could it be low on transmission fluid, maybe affecting the travel speed conditions. It looks to me there is no threads on the foot linkages that control the forward and reverse. So it looks like I am doing all I can do to go forward. Any suggestions?

Rls8836 said:

john Deere LT 155 seems to travel fast enough until you go up a little incline. This incline is only 20-25 ft. There is not any belt to control this, Is It? It seems it is all hydraulic controlled. I know this mower is kinda old around 1998-2001 but it doesn't smoke at all, seems to have good compression. Could it be low on transmission fluid, maybe affecting the travel speed conditions. It looks to me there is no threads on the foot linkages that control the forward and reverse. So it looks like I am doing all I can do to go forward. Any suggestions?

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You do have a belt and is't maybe time to put on a new one if you have had this tractor since new. Did you buy it new? If it is the original then it may be worn out.

gfp55 said:

You do have a belt and is't maybe time to put on a new one if you have had this tractor since new. Did you buy it new? If it is the original then it may be worn out.

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Gfp55 thanks for reply, I expect the belt is original. I didn't buy it new, it's a used mower my father-in-law bought and I am getting it in good shape for him. I looked under the mower and did not see this belt, only the blade belt. That was why I thought it was just hydraulic operated.

mechanic mark said:

https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=drive belt jd lt155

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Mechanic mark found your reply, thanks for the links. Is there any adjustment for the belt. I will look myself in a few minutes, it is probably the original one. I also am looking for the hood and cowl for the mower. Someone broke it, can't say it wouldn't be easy to do. Once again it is a Lt155.

Rls8836 said:

Mechanic mark found your reply, thanks for the links. Is there any adjustment for the belt. I will look myself in a few minutes, it is probably the original one. I also am looking for the hood and cowl for the mower. Someone broke it, can't say it wouldn't be easy to do. Once again it is a Lt155.

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How do I adjust the drive belt tension on a John Deere LT155


John Deere Hood Bumper Hinge LT133 LT150 LT155 LT160 LT166 LT170 LT180 AM128998 items in Bombergers Store store on eBay!

BELT DRIVE AND IDLERS
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
1 03M7187 Bolt 1 M8 X 35
2 14M7298 Flange Nut 5 M8
3 03M7216 Bolt 1 M8 X 50
4 M147132 Guide 1 BELT (SEE SIB. 02-11-25-06)
5 M131045 Bushing 1
6 M125774 Arm 1
7 19M7177 Cap Screw 2 M6 X 35
8 M43940 Snap Ring 1
9 M127620 Spacer 2
10 M127358 Pulley 1
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
11 F2863R Snap Ring 1
12 M127359 Fan 1
13 14M7397 Lock Nut 2 M6
14 M126636 Extension Spring 1
15 37M7089 Screw 2 M6 X 12 (IF THREADS ARE STRI PPED USE 19M7862 AND 14M7397)
16 M142313 Screw 3 M8 X 1.25, NLA; ORDER M167872
M167872 Screw 3
17 M151397 Guide Bar 1 BELT (FOR 38" (97 CM) AND 42" (1 , 07 M) DECKS) (SUB FOR M126531)
AM126546 Guide Bar 1 BELT (FOR 46" (1, 17 M) DECK)
18 M125786 Guide 1
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
19 M129045 Guide 1
20A ...... Bracket 1 - 045000 (SUB M141952) (ALSO ORDER AM130736)
20B M141952 Bracket 1 045001 -
20C AM130736 Converter Kit 1 NLA
21 M126633 Bushing 1
22 19H3837 Cap Screw 1 7/16" X 5"
23 M123830 Lock Washer 1
24 AM121968 Idler 1 (SUB FOR AM107335)
25 03M7224 Bolt 1 M8 X 65
26 M126009 V-Belt 1
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
27 AM131567 Pulley 1 (SUB FOR GY00034)
28 19M7803 Screw 1 M8 X 70
29 24M7298 Washer 1 8.400 X 25 X 2 mm
30 M125775 Guide 1
31 AM121970 Pulley 1 FLAT, (SUB FOR AM104666)
32 AM121967 Idler 1 V-GROOVE, (SUB FOR AM107334)
33 M70570 Spacer 1

mechanic mark said:

How do I adjust the drive belt tension on a John Deere LT155


John Deere Hood Bumper Hinge LT133 LT150 LT155 LT160 LT166 LT170 LT180 AM128998 items in Bombergers Store store on eBay!

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Mark great response, thanks for all the help and links you furnished. I know now a lot more than I did. Will replace the drive belt, I believe that will solve my problem.

Is your govenor openning up as it should when you start up the grade? gregjo1948

Guys would like to update my post about the speed problem with the Lt155. Finally I ordered a new belt and installed it today. Installed it, put mower deck back on and started it up. Initially I would mash reverse pedal and it would start moving in reverse, but push the pedal further and it did not move any faster. I let off the reverse pedal pushed the forward pedal and it started forward, pushed pedal further down and the forward speed did not increase. I repeated this 3-4 times then it stopped responding in either direction. no movement what so ever in any direction. Alll this was done at 1/2 to 3/4 throttle. I thought the belt had came off, shut engine down and removed the deck again to go underneath and see better. Everything was in order, all belt routing seemed to be in order. Now I am at a standstill pondering what might be amiss. Looked my belt # up on the John Deere site and the old belt has the same # on it. So it seems I have proper length. I jacked back of mower up and started it up and looked underneath the belt is not turning where it goes around engine pulley. Reached up and pushed forward pedal and the belt was still a little too loose to turn on the engine pulley. According to the belt routing someone posted here I have the belt around the pulleys correctly. Any ideas or can nI adjust the slack?

Look at the blowup on the thread!!!!

Bolt # 3 And pulley #31, that is obviously an adjustment point.

That should do the trick, if not, someone may have put on a smaller idler pulley, but that is the adjustment point.

Thanks Fish I got out there this morning laying under the mower and finally, I saw it. Just what you said. I replaced the belt and probably didn't even need it. I could have tried adjusting that on the old one, might have fixed it right there. Thanks for the reply, this site is good help.

Most brands do not have any way to adjust, so you were lucky there.

Also why I like having the tractor and engine's model/spec numbers, to look at the blowups, the fix could be right there....