I cannot keep power steering fluid in the reservoir. I just replaced the pump and reservoir and the lines that go with it so it is not leaking through there. But did look under the truck the other day because it is annoying and saw the steering shaft going into where I saw the leak. The part that the shaft is going into is connected to the frame, at least that's what it looks like, is that the steering box? If so is there a way to stop the leaks? I do not want to have to replace the whole box and talked to a guy and said that you could replace the seals? Any help would be great and appreciated.

 

2wd or 4wd ? It looks 2wd.... The seals for that year should be available at about any parts store, and you can change them with the steering box still on the truck.

Steering box input seal…piece of cake 30 minutes 78 f250 autozone part # 8520 $8.99 in stock Ford part # F3AZ-3E502-A .. Input Shaft Seal Kit
undue bolt at rag joint remove plastic cover on steering column (in cab) loosen steering column bolts(2 bolts to dash) pull up on column and disconnect rag joint from steering box
drill small hole in dust seal on steering box & screw a screw in and remove seal
remove snap ring
drill hole in seal remove with screw
replace seal, snap ring, dust seal and reconnect steering column.

Steering out put seal:
Remove the pitman arm from the sector shaft, then there's a snap ring that needs to be removed. Once that's out of the way there is a washer, then a seal, then another washer and another seal.
Remove the first washer exposing the first seal. Take a sharp center punch and pierce the seal, screw in a sheet metal screw and pry the seal out. You can do two screws 180 degrees apart too.
Once the first seal is out, remove the second washer and repeat the process.
To replace the seals, apply a thin coating of grease to the inner lip of the seal and a thin coat of sealer to the outside diameter of the seal (I like No. 2 Permatex non-hardening).
Slide the seal over the shaft and take a deep socket that's just slightly smaller than the OD of the seal and drive the seal in until it seats. Replace the washer then the next seal, washer then snap ring.
Re-install the pitman arm, hook up the steering linkage and that's it.
If you don't have a socket that's deep enough you can use a piece of pipe or tubing too.
Here's an illustration from the Ford parts catalog showing all the parts involved in the steering gear. The killer on these is getting everything centered. With the exception of the sector shaft Ford basically only sold the internals as an assembly.

Seal kit, steering gear sector shaft
Parts list #64, With gear ID SPA-AB, AJ, AN, BN, BS, BX, CC, CN
Basically this covers all 73-79 2WD F100-350 w/ power steering
D7AZ-3E501-A .. Sector Shaft Seal Kit
Last dealer cost $29.41 List $43.71

Parts International, Farmers Branch, TX has 50 (972) 241-8730
Green Sales, Cincinnati, OH has 19 (800) 543-4959
Manderbach Ford, Temple, PA has 5 (610) 929-3683
Freese Motor Inc., Monticello, IA has 4 (319) 465-3541
Herb Chambers Ford, Westboro, MA has 2 (508) 366-8311
https://www.ford-trucks.com/forums/1...+steering+seal

You will need to own, rent or borrow either a 2, 3 or 4 (I like a 4) finger gear puller to get the pitman arm off.

 

Ford/Saginaw P/S Gear: 1969 F100/250 2WD & F350 from serial number D96,001 / 1970/91 F100/250 2WD & F350 / 1975/76 F100/150 4WD / 1977/91 F150 4WD.

1977 F250 4WD from serial number Y20,001 (not a High Boy) / 1978/91 F250 4WD & Bronco / 1979/91 F350 4WD // Myriad 1965/2002 FoMoCo Passenger Cars.

1965/76: Ford only sold the master seal kit (C5AZ-3C538-A) which included both the input shaft & sector shaft seals.

1977: Ford replaced C5AZ-3C538-A with individual input shaft & sector shaft seal kits. These kits are available from Ford and every auto parts store.

F3AZ-3E501-A (replaced D7AZ-3E501-A & C5AZ-3C538-A) .. Input Shaft Seal Kit-Use with Ford/Saginaw P/S: 1969/91 F100/350 / 1978/91 Bronco / 1965/2002 FoMoCo Passenger Cars.

D7AZ-3E502-A (replaced C5AZ-3C538-A) .. Sector Shaft Seal Kit-Use with Ford/Saginaw P/S - 1969/79 F100/350 / 1978/79 Bronco / 1965/77 FoMoCo Passenger Cars.

1978 and later cars, 1980 and later F100/350's & Bronco's use a different sector shaft seal kit.

 

Thanks guys...I have been real busy since I wrote the last time and havent even been able to enjoy the truck. But anyways went out to crank up big red and it started squealing....thought it was because of the down pour we had the night before and the belt just slipping but by the time I realized it the belt was already thrown. The power steering pump is ceased up. Which sucks because that was brand new. I have the new seals coming so I can hopefully fix the box. Why did the new pump cease? Is there something in the lines that I need to replace or should I just take it in to the shop to get it fixed?

 

The p/s pump came with a warranty right? Hopefully you got a brand name that came with one....And "why" is one question we all ask.