ACMOC
Login | Register
ACMOC
Cat D7E dozer (SN: 47A5563) - Question about hydraulic hoses and fittings

Cat D7E dozer (SN: 47A5563) - Question about hydraulic hoses and fittings

Showing 1 to 8 of 8 results
ksliger
Topic Author
Offline
Member
Send a private message to ksliger
Posts: 89
Thank you received: 0
Greetings,

I am looking to replace a few of the hydraulic hoses on my D7E dozer (SN: 47A5563). The sleeve part number in the '172 & 173 Hydraulic Controls' parts book is 3S7166 and the straight fitting is part number 3S7165. Both are pictured below. It is my understanding that this old style of fitting\sleeve is reusable, unlike the newer style crimp fittings. I have found some of these old parts for sale. If I get the correct hydraulic hose from Cat, what is needed to press the sleeve onto the fitting? I'm trying to gauge whether or not to try to make my own hoses vs. take them to a hydraulic shop and pay a small fortune. Any information provided is greatly appreciated. 


  [attachment=76370]straight fitting.jpg[/attachment][attachment=76371]sleeve.jpg[/attachment]
Attachment
Attachment
Please log in or create an account to join the conversation.
Mon, May 13, 2024 12:26 AM
seiscat
Offline
Send a private message to seiscat
Posts: 1,319
Thank you received: 0
Well...it can be done with nothing more than a vice, a large hammer, some lube and some choice words! I made field repairs with those Cat re-usable fittings back in the 1980s and '90s on my D6Ds & D6H LGP.
Craig
 
Please log in or create an account to join the conversation.
Mon, May 13, 2024 12:58 AM
bluox
Offline
Send a private message to bluox
Posts: 360
Thank you received: 0
You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob
Please log in or create an account to join the conversation.
Mon, May 13, 2024 1:02 AM
ksliger
Topic Author
Offline
Member
Send a private message to ksliger
Posts: 89
Thank you received: 0
Reply to seiscat:
Well...it can be done with nothing more than a vice, a large hammer, some lube and some choice words! I made field repairs with those Cat re-usable fittings back in the 1980s and '90s on my D6Ds & D6H LGP.
Craig
 
[quote="seiscat post=256705 userid=5422"]Well...it can be done with nothing more than a vice, a large hammer, some lube and some choice words! I made field repairs with those Cat re-usable fittings back in the 1980s and '90s on my D6Ds & D6H LGP.
Craig

 [/quote]
Thank you. I might just try one and see how it goes.
Please log in or create an account to join the conversation.
Mon, May 13, 2024 1:30 AM
ksliger
Topic Author
Offline
Member
Send a private message to ksliger
Posts: 89
Thank you received: 0
Reply to bluox:
You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob
[quote="bluox post=256706 userid=2232"]You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob



 [/quote]
Thank you. I might just try to make one on my own and see how it goes before heading to Cat or a hose shop. By chance do you (or anyone) know the crimp-on equivalent of the old-style reusable straight fitting 3S7165?

 [attachment=76373]straight fitting.jpg[/attachment]
Attachment
Please log in or create an account to join the conversation.
Mon, May 13, 2024 1:34 AM
seiscat
Offline
Send a private message to seiscat
Posts: 1,319
Thank you received: 0
Reply to ksliger:
[quote="bluox post=256706 userid=2232"]You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob



 [/quote]
Thank you. I might just try to make one on my own and see how it goes before heading to Cat or a hose shop. By chance do you (or anyone) know the crimp-on equivalent of the old-style reusable straight fitting 3S7165?

 [attachment=76373]straight fitting.jpg[/attachment]
Attachment
Take one apart to see how it's made. To assemble one you must trim back a portion of the black outer ply to make room for the fitting.
Years ago I was like bluox, I thought a hydraulic press was necessary. My friend Tommy Watson showed me how it was possible to repair a re-useable type Cat hose with simple tools. 
You can read about Tommy in the feature article I authored in ACMOC magazine issue 164 "Still operating D8s in His 80s."
Craig
 
Please log in or create an account to join the conversation.
Mon, May 13, 2024 3:01 AM
bluox
Offline
Send a private message to bluox
Posts: 360
Thank you received: 0
Reply to ksliger:
[quote="bluox post=256706 userid=2232"]You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob



 [/quote]
Thank you. I might just try to make one on my own and see how it goes before heading to Cat or a hose shop. By chance do you (or anyone) know the crimp-on equivalent of the old-style reusable straight fitting 3S7165?

 [attachment=76373]straight fitting.jpg[/attachment]
Attachment
[quote="ksliger post=256709 userid=17769"]
[quote="bluox post=256706 userid=2232"]You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob



 
Thank you. I might just try to make one on my own and see how it goes before heading to Cat or a hose shop. By chance do you (or anyone) know the crimp-on equivalent of the old-style reusable straight fitting 3S7165?

 [attachment=76373]straight fitting.jpg[/attachment]

The number you gave is not a a fitting number.
As best I can tell the one in the picture is a XT-3 -12 -12 code 61 flange if it's a 6V4651.
I've kind of an amateur at this Cat hose work, only been doing it about 55 years and own a Cat hose press that does permanent and reusable fittings.
I have never heard of anyone trying to replace one with only a hammer and a vice so let me know how that turns out.
Bob[/quote]
[/quote]
Please log in or create an account to join the conversation.
Tue, May 14, 2024 11:33 PM
Skinner
Offline
Send a private message to Skinner
Posts: 487
Thank you received: 0
Reply to bluox:
[quote="ksliger post=256709 userid=17769"]
[quote="bluox post=256706 userid=2232"]You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob



 
Thank you. I might just try to make one on my own and see how it goes before heading to Cat or a hose shop. By chance do you (or anyone) know the crimp-on equivalent of the old-style reusable straight fitting 3S7165?

 [attachment=76373]straight fitting.jpg[/attachment]

The number you gave is not a a fitting number.
As best I can tell the one in the picture is a XT-3 -12 -12 code 61 flange if it's a 6V4651.
I've kind of an amateur at this Cat hose work, only been doing it about 55 years and own a Cat hose press that does permanent and reusable fittings.
I have never heard of anyone trying to replace one with only a hammer and a vice so let me know how that turns out.
Bob[/quote]
[/quote]
do you have a NAPA auto parts by you or an industrial supply house? If you have to buy the hose and the fittings, there’s nothing else to pay for they should put them together for you only takes a few minutes. Skinner 
Please log in or create an account to join the conversation.
Wed, May 15, 2024 12:19 AM
seiscat
Offline
Send a private message to seiscat
Posts: 1,319
Thank you received: 0
Reply to bluox:
[quote="ksliger post=256709 userid=17769"]
[quote="bluox post=256706 userid=2232"]You can buy a press for a large fortune or go the easy way and have a shop make hoses.
Some Cat stores won't use those fittings anymore.
The hose and fittings are the expensive part now.
If you give Cat the hose part number out of the parts book they will build you the correct hose.
Bob



 
Thank you. I might just try to make one on my own and see how it goes before heading to Cat or a hose shop. By chance do you (or anyone) know the crimp-on equivalent of the old-style reusable straight fitting 3S7165?

 [attachment=76373]straight fitting.jpg[/attachment]

The number you gave is not a a fitting number.
As best I can tell the one in the picture is a XT-3 -12 -12 code 61 flange if it's a 6V4651.
I've kind of an amateur at this Cat hose work, only been doing it about 55 years and own a Cat hose press that does permanent and reusable fittings.
I have never heard of anyone trying to replace one with only a hammer and a vice so let me know how that turns out.
Bob[/quote]
[/quote]
Hi Bob, 
Yes it is possible, I did not say it was easy. To assemble a hose trim the outer ply of the XT-3 hose back as you would to assemble it in a press. First place the collar portion on the hose then insert the lubed inner fitting in the hose. I would use the vice to put the initial squeeze on the slotted portion of the inner fitting but you can just tap with a hammer. This is done to make the installation of the collar easier. Slide the collar fitting down and install it. I used a large open-end wrench on the collar and drive it with the hammer until it became difficult, then switch to a large drift and hammer to drive it into position.
I did this whenever I had a situation that I had to get a 'dozer back to work and did not have a spare hose nor time to get one.
Yes if I owned; or had access to a press, I would have used one.
Craig  
Please log in or create an account to join the conversation.
Wed, May 15, 2024 3:32 AM
Showing 1 to 8 of 8 results
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

Booleroo 2025

Chapter Thirty

| Booleroo Centre, 54 Arthur St, Booleroo Centre SA 5482, Australia

CAFES 2025 TULARE, CALIFORNIA

Chapter Fifteen

| Tulare, California

Wheatlands Warracknabeal Easter Rally

Chapter Nineteen

| 34 Henty Hwy, Warracknabeal

HAMILTON PASTURAL MUSEUM

Chapter Nineteen

| Cnr Hiller Lane and Ballarat Road, Hamilton, Vic, 3300
View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I also joined a year ago. had been on here a couple of times as a non-member and found the info very helpful so I got a one year subscription (not very expensive at all) to try it out. I really like all the resources on here so I just got a three year. I think its a very small price for what you can get out of this site."
-Jason N

Join Today!