Waking up a Texas M151A2

[rickf]

No kits that anyone has ever found. I do have several kits for rebuilding the vacuum pumps.

[Fil Bonica]

The ever popular slant 6 fuel pump is the cheapest way to get on line .
P/n 60577 by Airtex.
About $20.00.


Fil Bonica

[Mr. Recovery]

The ever popular slant 6 fuel pump is the cheapest way to get on line .
P/n 60577 by Airtex.
About $20.00.


Fil Bonica

Like fil said, there is another number also but it is much older and may not be available.

[m3a1]

Excellent responses. At that price, no one has any excuse not to have a spare. I'll look into it mañana.

[rickf]

I am looking at the last couple photos with the side views of the pumps (actually third from the bottom) and I am noticing something. Look at the contact point where the foot will contact the cam, now look back to the pumps and see where that point is in comparison to the mounting holes. What I am seeing is telling me that the new pump will have the cam mostly depressed once it is mounted and get a very small stroke. I am assuming this works since you guys are running it but it has to be hard on the camshaft being at full compression like that.

[Mr. Recovery]

I am looking at the last couple photos with the side views of the pumps (actually third from the bottom) and I am noticing something. Look at the contact point where the foot will contact the cam, now look back to the pumps and see where that point is in comparison to the mounting holes. What I am seeing is telling me that the new pump will have the cam mostly depressed once it is mounted and get a very small stroke. I am assuming this works since you guys are running it but it has to be hard on the camshaft being at full compression like that.

I'll have to look for some photos of the 60577 pump arm/foot but, I think it is closer to the vac pump foot, the 4880 arm/foot seems to run higher on the cam lobe and has a longer slower pump action compared to the vac pumps quick short pump action. I haven't used the 4880, it was in a box of parts I picked up. Always searching for alternative parts!

[m3a1]

Speaking of alternative parts.....are there over the counter shocks out there for the A2?

[rickf]

Simple answer, no. There were NO rear shocks for the A2 for a long time but then a few years ago the market was flooded with A2 rear shocks from somewhere. The front shocks are the same as the A1 but again are not available over the counter. That being said, I am sure you could do it if you took the time to measure length bot open and closed, end types and hole sizes, and shock absorption rate, you could look up custom shocks from one of the aftermarket companies like Fox or Bilstien. I had posted one of those charts from Monroe on here a couple years ago but when I tried to find it again I could not. I will look through my computer and see if I can locate it.

[m3a1]

I was under my truck the other day and noted that there was a very slight wear mark on the drive shaft from being up against the lip of the muffler. It's not bright and shiny so I am assuming it is only a very intermittent contact. I also noticed that the strap securing the muffler was missing and with a little effort, found the muffler would be seated about 1/4 higher if it were properly secured (parts on the way for that).

So, with that, I'm assuming this tired truck is sitting a bit low. Both front and rear wheels are nearly perpendicular to the ground when the truck is unloaded and I know that's not quite right. However, the suspension seems stiff enough (though I have nothing to compare it with) with good rebound with me hopping on the front bumper or hitch and no obvious sign of leakage at the shocks. So I'd like an opinion. Am I probably dealing with tired springs or tired shocks? Where's the best place to start?

[rickf]

Shocks do nothing as far as ride height so if the ride height is low it is springs. Make sure someone in the past has not put modified inner swing arm brackets on the rear. The front wheels should be straight up and down within a couple degrees. Not enough to see. It is very unlikely that the springs sagged on a vehicle as light as this. The manual gives ride height specifications, I don't have them off the top of my head.

[m3a1]

Ok, thank you. By the way, I finally found plenty of posts on shocks by going in to Tech Discussion and searching by "Monroe Shock"

Specs for rear shocks were posted there and the Monroe "crossover" of #66627 comes in at $57 and change per shock at O'Reilly Auto parts. That price only represents a minor savings over originals if one happens to value originality.

Alternate / Cross Reference
Mfg. Part Number
11641029
12495
X12217

Technical Characteristics Data
MRC Criteria Characteristic
APHE OPERATION METHOD HYDRAULIC
BXYS PISTON END CONNECTION STYLE 11 RING
CXKS PISTON END NOMINAL INSIDE DIAMETER 0.760 INCHES
CXLB PISTON END NOMINAL OUTSIDE DIAMETER 1.760 INCHES
CXLF PISTON END NOMINAL THICKNESS 1.760 INCHES
BYBF CYLINDER END CONNECTION STYLE 11 RING
CXNW CYLINDER END NOMINAL INSIDE DIAMETER 0.760 INCHES
CXPG CYLINDER END NOMINAL OUTSIDE DIAMETER 1.760 INCHES
CXPM CYLINDER END NOMINAL THICKNESS 1.760 INCHES
CXDZ NOMINAL EXTENDED LENGTH 15.260 INCHES
CXFN NOMINAL COMPRESSED LENGTH 10.580 INCHES

SR-5 MANUFACTURERS CODE 19207

SR-5 DESIGN CONTROL REFERENCE 11641029

I'm going to get that muffler hung up right and we'll see how that fixes that clearance issue. Frankly, for what I do with my truck, I'm pretty well off even at the current ride height.

[rickf]

I just realized you have an A2, the front and rear wheel will be perpendicular to the ground at normal ride height. Only the straight and A1 have the positive camber in the rear wheels.
The muffler hanging down would have nothing to do with the suspension.

[m3a1]

For what it's worth, here's the tech on the Monroe 66627 Nitrogen Gas-charged Shock

Boot included - Yes
Compressed Bumper Stop included - Yes
Compressed length - 10-7/16"
Dust Shield included - Yes
Dust Shield material - metal
Extended Bumper Stop - Not included
Extended Hydraulic Lockout - Yes
Extended Length - 14-7/16"
Lower Mount Sleeve inside diameter - 3/4"
Lower Mount Type - Loop/Bushing
Travel Length - 4-1/32"
Upper Mount Sleeve inside diameter - 3/4"
Upper Mount Type - Loop/Bushing

[rickf]

Extended length is 3/4" shorter, That will amount to substantially more out at the wheel. You may find you are fully extended at or below empty sitting height.

[m3a1]

Yeah, not as close a match as the earlier thread suggested.