2013 Pro Rmk jackshaft
- Thread starter rmk8001
- Start date
13 is different than 14 or 15 (which should be the same as each other)... the bolt hole is different depth. However I believe you should be able to use 14 or 15 shaft on a 13 if you simply use the 14/15 top bolt (or ARP), the splines are the same...
Bolt length needed on QD end is different on the 14/15 jackshaft than the 13. Your going to need bolt size 10mmx 1.25 RH thread, 40mm UHL if you install a 14/15 shaft. ARP # 663-1005. Also see info below on replacing domed to flat washer.
Here's a copy from MH post on this.
Quote:
From MY2014 Serivice manalNOTE:*Do not use the belleville (domed) washer
used on 2013 vehicles when installing the kit. Use
the flat washer, Polaris PN 7556800, when installing
the upper sprocket and bolt.
Lock the brake lever to hold the shafts after you install the belts and snug down the bolts part way
Torque the bolts to 45-47 ft-lbs.
NOTE:*
These*ARP*bolts are black oxide coated...They will rust.*
I clean the heads with brake cleaner... and then give them a quick coating of Rustoleum "Cold Galvanize"... get it at your hardware store... and it comes in handy for other stuff as well... You could also paint them with some clear or colored paint.*
BoeShield™ also works well for this and is also good to have on hand.*
CLICK HERE BoeShield™
I am aware that*ARP*offers Stainless bolts in the same size... but they do not have the same high strength properties as the 4730 bolts.
Quote:
ARP:
8740 CHROME MOLY: Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard*ARP*production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.*
What is the difference between 4130 and 8740 chrome moly?
Both are alloy steels with similar chemistry. The 4130 has only .3% carbon and can’t be hardened as high as 8740, which has .4% carbon. Also, 8740 has about .45% nickel and 4130 has none. Both have moly (most alloy steels have moly). The chromium content of 4130 is slightly higher, .95% instead of .55% (for the 8740). However, 8740 is generally considered to have slightly better toughness due to the nickel.
Bottom 2013/2014/2015
2013 TOP
NOTE:*The 2013 PRO RMK with QuickDrive™ uses the SAME BOLT on the top and bottom pulleys.
The 2014 and 2015 are the model year PRO's with different bolts top and bottom.*
YOU WILL ONLY NEED THIS ONE BOLT FOR THE TOP AND BOTTOM ON THE 2013 whereas the 2014/15 uses both bolts.*
AND
ARP-663-1001
Bolts, Hex Head, Chromoly Steel, Black Oxide, 10mm x 1.25 RH Thread, 20mm UHL
http://www.summitracing.com/nv/parts/arp-663-1001
Top 2014/2015
NOTE:*2014 & 2015 REQUIRE this different LONGER top bolt, It still uses the shorter lower bolt as well.*
The 2013 does NOT need this longer bolt... It uses TWO of the shorter bolts immediately above.
ARP-663-1005
Hex Head, Chromoly Steel, Black Oxide, 10mm x 1.25 RH Thread, 40mm UHL
http://www.summitracing.com/nv/parts/arp-663-1005
Here's a copy from MH post on this.
Quote:
From MY2014 Serivice manalNOTE:*Do not use the belleville (domed) washer
used on 2013 vehicles when installing the kit. Use
the flat washer, Polaris PN 7556800, when installing
the upper sprocket and bolt.
Lock the brake lever to hold the shafts after you install the belts and snug down the bolts part way
Torque the bolts to 45-47 ft-lbs.
NOTE:*
These*ARP*bolts are black oxide coated...They will rust.*
I clean the heads with brake cleaner... and then give them a quick coating of Rustoleum "Cold Galvanize"... get it at your hardware store... and it comes in handy for other stuff as well... You could also paint them with some clear or colored paint.*
BoeShield™ also works well for this and is also good to have on hand.*
CLICK HERE BoeShield™
I am aware that*ARP*offers Stainless bolts in the same size... but they do not have the same high strength properties as the 4730 bolts.
Quote:
ARP:
8740 CHROME MOLY: Until the development of today’s modern alloys, chrome moly was popularly considered a high strength material. Now viewed as only moderate strength, 8740 chrome moly is seen as a good tough steel, with adequate fatigue properties for most racing applications, but only if the threads are rolled after heat-treatment, as is the standard*ARP*production practice. Typically, chrome moly is classified as a quench and temper steel, that can be heat-treated to deliver tensile strengths between 180,000 and 210,000 psi.*
What is the difference between 4130 and 8740 chrome moly?
Both are alloy steels with similar chemistry. The 4130 has only .3% carbon and can’t be hardened as high as 8740, which has .4% carbon. Also, 8740 has about .45% nickel and 4130 has none. Both have moly (most alloy steels have moly). The chromium content of 4130 is slightly higher, .95% instead of .55% (for the 8740). However, 8740 is generally considered to have slightly better toughness due to the nickel.
Bottom 2013/2014/2015
2013 TOP
NOTE:*The 2013 PRO RMK with QuickDrive™ uses the SAME BOLT on the top and bottom pulleys.
The 2014 and 2015 are the model year PRO's with different bolts top and bottom.*
YOU WILL ONLY NEED THIS ONE BOLT FOR THE TOP AND BOTTOM ON THE 2013 whereas the 2014/15 uses both bolts.*
AND
ARP-663-1001
Bolts, Hex Head, Chromoly Steel, Black Oxide, 10mm x 1.25 RH Thread, 20mm UHL
http://www.summitracing.com/nv/parts/arp-663-1001
Top 2014/2015
NOTE:*2014 & 2015 REQUIRE this different LONGER top bolt, It still uses the shorter lower bolt as well.*
The 2013 does NOT need this longer bolt... It uses TWO of the shorter bolts immediately above.
ARP-663-1005
Hex Head, Chromoly Steel, Black Oxide, 10mm x 1.25 RH Thread, 40mm UHL
http://www.summitracing.com/nv/parts/arp-663-1005
