Running and testing the 2-10-0 HO Penn Line Steam Locomotive which starts binding

Sometimes old metal kit built locomotives have tiny flaws that are intermittent or develop over time. to fully get to the bottom of this problem will require a full diagnostics.

[@monsvillerailways5736]

Sounds like the rods are catching in the running gear as you say. It's a common problem if you accidently grip them when picking her up. Happens to us all. Good luck. Happy Modelling

[@scottb8175]

Penn Line was bought out by Bowser. The DC-71 pitman style motors in those old kits were powerful and bulletproof. I have had a few of Bowser's kit steam locomotives and preferred them over most brands of plastic steam. With patience and skill, the Bowser kits can build into a very nice running and looking model. I've seen some very nicely built Bowser K-4's that rival brass in appearance and could pull every car on the layout. The only thing I didn't like was most of Bowser's line were Penn Line models of Pennsy locomotives. Great if you model the Pennsy, I guess. The side rods can bind for many not so obvious reasons - the most typical outside of obvious visible damage or parts interference are drivers out of quarter, binding valve gear, and worn out side rods and pins (screws). If there is too much clearance (sloppy loose fit) between the rods and pins, the rods will intermittently seize. It happens if the axle bearings are worn out too. Look for a cracked nylon gear on the geared driver, or worn out or improperly meshed (too much or too little clearance / lash) worm or gear teeth. If any of the above, the solution won't be an easy one. Too bad Bowser doesn't sell parts for those anymore.

[@bobbyshobbiesTrainHunter]

Thankyou