I have a FIX for the clunking noises and stalls of the Petmate Purrforma Automatic Litter Box.
I just bought a Petmate Purrforma extra large off of e-bay. They claimed it was new never used. After I won the bid I started looking for supplies and information about the machine, I had wanted one since they first came out.
Then I discovered the complaints. I am a former technician and I decided to analyze the complaints and be ready to address known problems as they occurred. I should mention that I have 6 cats and am giving the box a true workout.
Well right off the bat the box started hanging up in the rake sweep as it ascended the platform to dump in the container. I took it apart and discovered that the black nylon tube that attaches to the top of the rake guide was cracked, switch side, and causing the hang up. Obviously the box was not new. The tube comes right off and looks like it should be a spared part, I will write to the company about this ASAP, in the meantime I reinforced the section with epoxy putty, available at any hardware store or Home Depot. Now it works great, no hang up and smooth quiet operation. I will monitor how long this fix works and let everyone know.
I discovered that if you overfill the box, the waste will end up behind the rake. If you use a heavy clay cat litter it wont clump well and will apply too much pressure to the rake and bend it. DO NOT assume this is a design flaw. You would not want your cat trapped somehow in a box that could physically injure her. The box is designed in a lightweight fashion for safety reasons which is why it has a 12VDC motor and an aluminum rake.
People you must be smarter than the box. Use lightweight cat litter for starters, here’s a link to what I’m using it’s called P.POD and is all natural and NOT clay and VERY light
http://www.jbpet.com/P-Pod-Clumping-Cat ... ,1255.html , it is solid clumping litter and works very well. P.POD is available from Fred Meyer in my area (Kroger Food Group). Fill with fresh litter as you empty the waste container, but be sure to only add it across the rake at the back of the box up to the middle of the box, DO NOT OVERFILL, and NEVER add litter on the ramp up to the waste container. I find that the convenience of not having to sift cat litter daily is immense in spite of known problems and even though I have to empty it daily.
Since beefing up the nylon tube guide I have had no issues with noise or faulty running. I’ll let everyone know if it quits and whether I can fix it or not, and I will let you know the response from Petmate about sparing (replacement part) the nylon tube that causes the malfunction and is giving this system such a bad reputation.
Last night I found three of my cats playing with the box while it was running standing on the plastic flap that lifts to allows the litter to be deposited under it into the waste container. Needless to say this could be a problem, but the box held up to the Cat curiosity and survived the excess weight.
PLEASE don’t chuck the box without trying this tube fix if you are experiencing clunking noises and stalls. If you need help with this procedure I will be more than willing to help anyone by sending photo’s or other information as necessary. Contact me on MySpace – Kiznkitten