Thanks Tim...I’ll order the orings that I need as well as some silicone grease and what do you think about a better valve while I have it apart? I’ll get the barrel all squeaky clean as well. Will report back.
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Question for the experts
- Thread starter JasonBowlin
- Start date
Jason,
You probably can do with the same valve, but it wouldn't hurt to take it apart and clean it. Also, if you want to make it a little more efficient and consistent, you could replace the stock valve spring with a lighter one. In doing this, keep in mind that you will have to retune it, and those o rings that were installed as a hammer bounce reducer might not work as well, or not at all, hindering the tuning process.
Tom Holland
Field Target Tech
You probably can do with the same valve, but it wouldn't hurt to take it apart and clean it. Also, if you want to make it a little more efficient and consistent, you could replace the stock valve spring with a lighter one. In doing this, keep in mind that you will have to retune it, and those o rings that were installed as a hammer bounce reducer might not work as well, or not at all, hindering the tuning process.
Tom Holland
Field Target Tech
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.25 marauder is a very good rifle, if yow know your rifle, you can go 100yard easy.... first you have to meet the sweet spot of it (from what up to what pressure you fill your rifle)..... clean your barrel.... try jsb kings pellets
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I am enjoying this thread. I am totally comfortable tearing down and tuning a springer. But, I'm new to PCP's and am itching to eventually take down my Marauder and learn how to tune/work on it as well. Anxious to see the end results of this for you Jason........y'all carry on
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TiredRooster,
If you'd like to see a complete teardown and rebuild of a Marauder, check out my UTUBE Channel, Field Target Tech. I have several videos on the Marauder, and walk you through step by step.
Tom Holland
Field Target Tech
Fieldtargettech.com
If you'd like to see a complete teardown and rebuild of a Marauder, check out my UTUBE Channel, Field Target Tech. I have several videos on the Marauder, and walk you through step by step.
Tom Holland
Field Target Tech
Fieldtargettech.com
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Tom, where’s the best place to get all the orings and the spring you refer to..I have no problem removing the buffer mod and will most likely start from scratch on tuning any way. I tried the website that kkarmical linked but can’t get any of the part numbers to work...Amazon has a kit for 13$ By captain oring but even with my prime membership says Tuesday delivery.
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Better picture
this helps a lot!
With that you're going to have that Mrod shooting accurately in no time.
At the oringstore you do have to individually look up the orings, takes a little time, but for the price of one captain oring set, you'll have enough orings for years to come.
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Jason,
I wouldn't experiment with the Amazon kit, or Harbor Freight o ring kits. The rubber is inferior, and you can actually see a seam on the sealing surface. I would try the O Ring store again, as suggested. Or you can spend a few dollars and get the entire set from Archer Airguns or direct from Crosman. Specify a .22, because inside the barrel has a different size oring than other size barrels.
As for springs, I take the original, and go to a good hardware store with a good spring selection. I'll get all kinds of springs, softer as well as harder, and several of each. This will allow me to cut and stretch springs, and keep the original in tact. It might be a good thing to put a little paint of a bright color on the original, so it doesn't get mixed up with the newly purchased ones. Also, when spring shopping, bring the end cap along with the hammer spring screw installed, along with the hammer. This will insure that the spring fits correctly in each. You don't want it too loose to get bent upon compression, and you don't want it too tight to bind.
Tom Holland
Field Target Tech
I wouldn't experiment with the Amazon kit, or Harbor Freight o ring kits. The rubber is inferior, and you can actually see a seam on the sealing surface. I would try the O Ring store again, as suggested. Or you can spend a few dollars and get the entire set from Archer Airguns or direct from Crosman. Specify a .22, because inside the barrel has a different size oring than other size barrels.
As for springs, I take the original, and go to a good hardware store with a good spring selection. I'll get all kinds of springs, softer as well as harder, and several of each. This will allow me to cut and stretch springs, and keep the original in tact. It might be a good thing to put a little paint of a bright color on the original, so it doesn't get mixed up with the newly purchased ones. Also, when spring shopping, bring the end cap along with the hammer spring screw installed, along with the hammer. This will insure that the spring fits correctly in each. You don't want it too loose to get bent upon compression, and you don't want it too tight to bind.
Tom Holland
Field Target Tech
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Ok guys waiting on some parts and will update when they arrive and we can go forward....labradar, vortex optics, hill valve, and more.
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I like trying the longer distances. Experimenting with different pellets and speeds to find the combination needed to hit consistently is a lot of fun.
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Do not use any type of grease or other lubricant for gun O rings. At high pressure O ring deforms to fill area and with grease it can’t work properly.
Do not compere it to hand pump. Most of the O rings on a hand pump works in low pressure and those that work in high pressure replace regularly and small leaking is not important there.
Do not compere it to hand pump. Most of the O rings on a hand pump works in low pressure and those that work in high pressure replace regularly and small leaking is not important there.
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Going to have to disagree with you on this. Using orings not lubed is just asking for leaks, no matter how dense the oring.
Silicon greese like Trident is good, but Dow High Vacuum grease, it's made for just that, to perform under pressures.
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Going to have to disagree with you on this. Using orings not lubed is just asking for leaks, no matter how dense the oring.
Silicon greese like Trident is good, but Dow High Vacuum grease, it's made for just that, to perform under pressures.
I’v never saw that vacuum grease. I used normal molycote silicone grease and found O ring failure and leaking with it.
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Just an update to those following, I have received the new hammer, valve and orings. Im currently waiting for the regulator and new barrel from crosman. I figured while i had it all aprt now was time to make it the best it can be. Remaining parts should be in soon and we can get back to work.
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To all followers, all parts have arrived and have been installed and test fired a few times with labradar just to ensure everything was cooperating. Got the new vortex glass mounted tonight and weather permitting will start tuning with Toms assistance tomorrow.
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Ok had some time to fire some shots today..here is the first string.
regulator set to 120bar, roughly 1750psi
filled to approximately 2800 as my scuba is low and my scba fill station is in the mail.
Hammer spring turned all the way out
Stock transfer port.
pellet was crosman premier ultra magnum dome
1. 867.
2. 876.
3. 885.
4. 879.
5. 877.
6. 883.
7. 878.
8. 879.
9. 881.
10. 878.
11. 868.
12. 881.
13. 872.
14. 871.
15. 884.
16. 878.
17. 878.
18. 875.
19. 869.
20. 885.
21. 876.
22. Missed.
23. Missed.
24. 861.
25. 865.
26. 853.
27. 851.
28. 848.
29. 840.
30. 843.
if I delete last 5 shots. I get ES of 24 and SD of 6.5. Not terrible considering it’s all new guts and barrel and none have probably settled in yet. Shooting at 15 yards in doors and accuracy was mediocre at best. Thoughts??
regulator set to 120bar, roughly 1750psi
filled to approximately 2800 as my scuba is low and my scba fill station is in the mail.
Hammer spring turned all the way out
Stock transfer port.
pellet was crosman premier ultra magnum dome
1. 867.
2. 876.
3. 885.
4. 879.
5. 877.
6. 883.
7. 878.
8. 879.
9. 881.
10. 878.
11. 868.
12. 881.
13. 872.
14. 871.
15. 884.
16. 878.
17. 878.
18. 875.
19. 869.
20. 885.
21. 876.
22. Missed.
23. Missed.
24. 861.
25. 865.
26. 853.
27. 851.
28. 848.
29. 840.
30. 843.
if I delete last 5 shots. I get ES of 24 and SD of 6.5. Not terrible considering it’s all new guts and barrel and none have probably settled in yet. Shooting at 15 yards in doors and accuracy was mediocre at best. Thoughts??
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String 2 same settings
pellet JSB Exact Jumbo Diablo 15.89
around 2750-2800 fill
1. 849.
2. 863.
3. 855.
4. 848.
5. 875.
6. 856.
7. 862.
8. 858.
9. 856.
10. 847.
11. 849.
12. 854.
13. 860.
14. 852.
15. 849.
16. 849.
17. 846.
18. 852.
19. 851.
20. 850.
21. 836.
22. 854.
23. 857.
24. 848.
25. 840.
26. 842.
27. 836.
28. 834.
29. 846.
30. 821.
ES 54 SD 10.2
if I take out just the high and low I get
ES of 28 and SD of 7.5
accuracy was much better
pellet JSB Exact Jumbo Diablo 15.89
around 2750-2800 fill
1. 849.
2. 863.
3. 855.
4. 848.
5. 875.
6. 856.
7. 862.
8. 858.
9. 856.
10. 847.
11. 849.
12. 854.
13. 860.
14. 852.
15. 849.
16. 849.
17. 846.
18. 852.
19. 851.
20. 850.
21. 836.
22. 854.
23. 857.
24. 848.
25. 840.
26. 842.
27. 836.
28. 834.
29. 846.
30. 821.
ES 54 SD 10.2
if I take out just the high and low I get
ES of 28 and SD of 7.5
accuracy was much better
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3rd String same settings
pellet JSB Exact Jumbo Heavy Diablo 18.13
1. 821.
2. 828.
3. 836.
4. 834.
5. 819.
6. 833.
7. 822.
8. 826.
9. 821.
10. 827.
11. 826.
12. 819.
13. 820.
14. 813.
15. 830.
16. 842.
17. 826.
18. 817.
19. 822.
20. 826.
21. 829.
22. 831.
23. 827.
24. 814.
25. 815.
26. 811.
27. 804.
28. 799.
29. 794.
30. 797.
ES 47 SD 11.4
Take high and low out.
ES 39 SD 9.9
pellet JSB Exact Jumbo Heavy Diablo 18.13
1. 821.
2. 828.
3. 836.
4. 834.
5. 819.
6. 833.
7. 822.
8. 826.
9. 821.
10. 827.
11. 826.
12. 819.
13. 820.
14. 813.
15. 830.
16. 842.
17. 826.
18. 817.
19. 822.
20. 826.
21. 829.
22. 831.
23. 827.
24. 814.
25. 815.
26. 811.
27. 804.
28. 799.
29. 794.
30. 797.
ES 47 SD 11.4
Take high and low out.
ES 39 SD 9.9
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