Cub 42C-1 Belt Adjustment

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Baxter28
Posts: 37
Joined: Sun Aug 14, 2016 11:11 am
Zip Code: 16137
Tractors Owned: 1953 F-Cub Serial No. 160499JL

Cub 42C-1 Belt Adjustment

Postby Baxter28 » Thu Jul 06, 2017 3:13 pm

I am going to put a new belt on my mower but I am confused. How tight should the belt be adjusted? I have read the Woods manual and it is equally vague.

With the old belt, I was getting a lot of vibration. I checked and the blades weight within 1/4 ounce of each other. The 6 bolts holding the spindle to the frame are as tight as I could get them without breaking them off. The spindle bearings are tight, freshly greased, and rotate without any tight spots.

User avatar
Rick Spivey
Cub Pro
Cub Pro
Posts: 2260
Joined: Sun Jul 01, 2007 10:07 pm
Zip Code: 29518
Circle of Safety: Y
Location: SC, Cades 29518

Re: Cub 42C-1 Belt Adjustment

Postby Rick Spivey » Fri Jul 07, 2017 5:24 am

I put them on with the deck in the raised position, as tight as I can get them using a 2 foot cheater bar to push the pulleys down in their slots (tire breaker bar). Try to get the two pulleys as even as possible, and at the same time, try to get it so the belt is horizontal (flat) going from the left pulley to the deck. I believe the belt will tighten ever so slightly once the deck is down. I find that I can't really get them too tight, using reasonable force and bar length.
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)

Baxter28
Posts: 37
Joined: Sun Aug 14, 2016 11:11 am
Zip Code: 16137
Tractors Owned: 1953 F-Cub Serial No. 160499JL

Re: Cub 42C-1 Belt Adjustment

Postby Baxter28 » Fri Jul 07, 2017 7:10 am

Thank you. Now this is something I understand. I guess my worry about making the belt this tight was how it would load the spindle and pulley bearings. Probably the pulleys more than the spindle since I can grease it.

User avatar
tmays
5+ Years
5+ Years
Posts: 2615
Joined: Wed May 11, 2011 8:59 pm
Zip Code: 39180
Tractors Owned: 1948 Allis Chalmers G
1947 Cub
1952 Cub

154 Cub LoBoy
Location: Vicksburg, MS

Re: Cub 42C-1 Belt Adjustment

Postby tmays » Fri Jul 07, 2017 7:20 am

I don't tighten mine that tight. I'd have to check deflection to give you an idea on how tight mine are. I loosen the idler pulley bolts just enough that they will slide when tapped with a hammer. I want them tightened so belt won't slip, but not much tighter. Good belt, no grease on pulley track or belt, and you would be surprised how belt won't slip with not a lot of tightening.
Thomas

User avatar
Rick Spivey
Cub Pro
Cub Pro
Posts: 2260
Joined: Sun Jul 01, 2007 10:07 pm
Zip Code: 29518
Circle of Safety: Y
Location: SC, Cades 29518

Re: Cub 42C-1 Belt Adjustment

Postby Rick Spivey » Fri Jul 07, 2017 5:31 pm

I realize my description may make it sound like I really tighten the ??? out of these belts; sorry, I didn't mean to convey that exactly. But I will say if I don't use a short rod to help put tension on them, I have had them fly off more than once. The last sentence was most important, a reasonable amount of force with a short rod. Thomas seems to have success using a hammer to tap his pulleys into the right spot. I dare say my mower is not in as good a shape; I find the pulleys just won't slip until they are so loose that they won't hold. My mower has not been refurbished, or even cleaned all that well, lately. Again, reasonable force, not all you can give it!!!!
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)

Baxter28
Posts: 37
Joined: Sun Aug 14, 2016 11:11 am
Zip Code: 16137
Tractors Owned: 1953 F-Cub Serial No. 160499JL

Re: Cub 42C-1 Belt Adjustment

Postby Baxter28 » Sat Jul 08, 2017 12:39 pm

OK, I am really stumped. I have checked these items and still have a major problem. 1) the idler bearings are on good shape and almost new. 2) the drive pulley is on the PTO shaft the whole way and tight. 4) The main spindle bearings are tight and free. 4) I just put on a Gates HiPower B136 (21/32" X 139") belt which is the same as I just broke. 5) I tightened the belt as recommended. Now the problem. With the ignition off and the PTO engaged, the belt rolls on the PTO pulley and comes off using just the starter to turn it over. ?????
If I knew how to post a few photos I would.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 17419
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Cub 42C-1 Belt Adjustment

Postby Eugene » Sat Jul 08, 2017 12:51 pm

The idler pulleys need to be adjusted so that the belt runs vertical (straight up and down) from the pto pulley.
I have an excuse. CRS.

Baxter28
Posts: 37
Joined: Sun Aug 14, 2016 11:11 am
Zip Code: 16137
Tractors Owned: 1953 F-Cub Serial No. 160499JL

Re: Cub 42C-1 Belt Adjustment

Postby Baxter28 » Sat Jul 08, 2017 1:11 pm

How do you adjust these pulleys? Do you slot the bolt holes at the front of the pulley bracket so it can slide back farther?

User avatar
tmays
5+ Years
5+ Years
Posts: 2615
Joined: Wed May 11, 2011 8:59 pm
Zip Code: 39180
Tractors Owned: 1948 Allis Chalmers G
1947 Cub
1952 Cub

154 Cub LoBoy
Location: Vicksburg, MS

Re: Cub 42C-1 Belt Adjustment

Postby tmays » Sat Jul 08, 2017 1:34 pm

Are you familiar with procedure for removing the pulley?

Also, do you have correct pulley?
Thomas

staninlowerAL
5+ Years
5+ Years
Posts: 3731
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Cub 42C-1 Belt Adjustment

Postby staninlowerAL » Sat Jul 08, 2017 1:52 pm

Sometimes the PTO pulley can be re-positioned to achieve a better alignment with the idler pulleys. Is yours a taper-loc bushing? I've seen them installed by placing the bushing on the PTO shaft first then the sheave. It's a bit difficult to install and remove but possible.

Baxter28
Posts: 37
Joined: Sun Aug 14, 2016 11:11 am
Zip Code: 16137
Tractors Owned: 1953 F-Cub Serial No. 160499JL

Re: Cub 42C-1 Belt Adjustment

Postby Baxter28 » Sat Jul 08, 2017 2:14 pm

Yes it is a taper-loc. I thought about reversing the pulley and the lock. I also though about cutting about 3/8" off the front of the taper-loc so the puller would slide on farther.

User avatar
tmays
5+ Years
5+ Years
Posts: 2615
Joined: Wed May 11, 2011 8:59 pm
Zip Code: 39180
Tractors Owned: 1948 Allis Chalmers G
1947 Cub
1952 Cub

154 Cub LoBoy
Location: Vicksburg, MS

Re: Cub 42C-1 Belt Adjustment

Postby tmays » Sat Jul 08, 2017 4:10 pm

Got pics? Should be no problem getting it to align
Thomas

User avatar
Rick Spivey
Cub Pro
Cub Pro
Posts: 2260
Joined: Sun Jul 01, 2007 10:07 pm
Zip Code: 29518
Circle of Safety: Y
Location: SC, Cades 29518

Re: Cub 42C-1 Belt Adjustment

Postby Rick Spivey » Sat Jul 08, 2017 4:49 pm

What size (diameter) are your idler pulleys? They should be in the 8" - 9" range, if I am not mistaken. Running smaller ones would affect alignment in both directions (to PTO, and to deck).
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)

Baxter28
Posts: 37
Joined: Sun Aug 14, 2016 11:11 am
Zip Code: 16137
Tractors Owned: 1953 F-Cub Serial No. 160499JL

Re: Cub 42C-1 Belt Adjustment

Postby Baxter28 » Sat Jul 08, 2017 8:07 pm

I do have pictures but unfortunately I do not know how to upload them on this sight plus my photos are around 3.88Mb in size. All the photos are on my computer.

staninlowerAL
5+ Years
5+ Years
Posts: 3731
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Cub 42C-1 Belt Adjustment

Postby staninlowerAL » Sat Jul 08, 2017 9:32 pm

You can resize the picts and post them or email to me and I will resize and post for you. rigs102@millry.net


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: No registered users and 3 guests