KK500 Maintenance

[juleslewis]

I have KK500 that needs its trigger cleaned. I first need to remove the action from the stock. I assume this means removing the 4 allen head screws in front of the trigger guard. Are there other screws that need to be removed? Any advice would be welcome.
Thanks,
Jules Lewis

[juleslewis]

I got smart and ran a search and found the 5th screw under the trigger guard.

[nicolas G]

Hi, I'm going to follow this post with interest as I think my mechanism needs a cleaning too.

[juleslewis]

I removed the action from the stock and knocked out the 2 pins that hold the trigger unit to the action. There was some external crud that I brushed off. What should I use to wash out the trigger unit? My Walther manual has nothing on trigger cleaning. Some Anschutz owners use lighter fluid. Triggertech owners use lighter fluid, brake cleaner, and rubbing alcohol. Is there anyone out there who has cleaned a KK500 trigger?

[juleslewis]

Washed the trigger unit with Lighter Fluid. Brushed off any remaining crud and re-installed the trigger unit. The KK500 is now back to normal.

[nicolas G]

Juleslewis,
I would like to know if there was a malfunction before the cleaning. Thank you.

[analretentive]

I was looking for the same information, And figured the best source was Walther USA. I was wrong. Email and phone calls produced a promise that someone would get back to me...crickets.

It is a wonderful trigger and I would like to keep it that way. I've used lighter fluid on other triggers, but would prefer manufacturer's advice first.

Gerry

[nicolas G]

I was asking because I use an old Walther with a really good barrel. For me the trigger works fine but I can't get the trigger weight down as I'd like and I wonder if a bath in a cleaning product might improve its operation.

[Tim S]

I was asking because I use an old Walther with a really good barrel. For me the trigger works fine but I can't get the trigger weight down as I'd like and I wonder if a bath in a cleaning product might improve its operation.

In my experience, dirt tents to make a trigger feel scratchy, slow, or inconsistent rather than heavy. If the trigger is smooth, but just heavier than you want cleaning may not fix the problem; some older rifles weren't designed for a super light release. Cleaning is unlikely to hurt though, so it's worth a go.

[Tim S]

I was asking because I use an old Walther with a really good barrel. For me the trigger works fine but I can't get the trigger weight down as I'd like and I wonder if a bath in a cleaning product might improve its operation.

In my experience, dirt tents to make a trigger feel scratchy, slow, or inconsistent rather than heavy. If the trigger is smooth, but just heavier than you want cleaning may not fix the problem; some older rifles weren't designed for a super light release. Cleaning is unlikely to hurt though, so it's worth a go.

[analretentive]

I was asking because I use an old Walther with a really good barrel. For me the trigger works fine but I can't get the trigger weight down as I'd like and I wonder if a bath in a cleaning product might improve its operation.

You can reduce pull weight by extending the lever. It will not affect the internal operation of your trigger or sear. I believe triggers are tested
at the center of the lever, so moving your contact point to the cusp will reduce the effort required as well.

Gerry

[nicolas G]

Tim, you're right, a good cleaning can't hurt.
This trigger is nice and clean, and its starting weight is about 200 grams. It's a matter of habit, but I'd prefer it to be lighter. My rifle is from 1970 and I've had it for just over a year. It came from Germany as new. It must have been in storage for decades. Currently, the wooden stock is being improved (hook, cheek rest, sight extension).
I'd like to take this opportunity to ask a question to the Walther specialists. My trigger is of the same design as that of the 10 m rifle, model LGR, which is lighter. A long time ago, I seem to have read on the net that it could be installed on a 22 LR match rifle. I found some photos and it's exactly the same.
A lighter spring must be mounted on it (at least I think so, but I could be wrong).
Could someone tell me more?
Thank you for your help.
All the best.

[nicolas G]

Gerry,
I didn't read your message before writing.
If I understand correctly, extending the lever means installing a longer trigger tail?

[analretentive]

Nicolas, I call it a shoe. I've got a Senseive that I've adjusted as far down as possible with a lump of modeling clay on the cusp. Probably twice as far from the fulcrum as designed.

I doubt any of y'all would be comfortable with 6 grams.

Gerry

[nicolas G]

Gerry,
would it be possible to have a photograph of your modified trigger cue?
Thank you, Gerry.

[analretentive]

Weird , huh? I'm not insane. I shoot benchrest and the only thing I come in contact with on the entire apparatus is the spot indicated by the arrow.

gerry

[nicolas G]

Gerry,
thank you very much for the photograph.

[juleslewis]

Sorry for not getting back to the group sooner. Just returned from a cold, but fun, day at the range with the Walther. It performed flawlessly. I, on the other hand, did not. I have been recuperating from heart surgery and had not used the rifle for 3 months. I admit to not cleaning the trigger during the 8 years of ownership. I have been shooting a light weight (Tikka) rimfire. On Tuesday, I took the Walther to the range without checking it out beforehand. Got set up, put a round on the feed tray, ran the bolt forward and turned the handle. Pressed the trigger and nothing happened. The sear was not catching on the bottom of the firing pin. (I may not be using the correct terminology) When I removed the trigger unit and looked a the sear, it was gummed up and did not move. Flushing with lighter fluid freed it up.

[nicolas G]

Great, a good cleaning will have brought it back to life.