convoyduel Posted May 23, 2023 Share Posted May 23, 2023 Could any fine member on here point me towards the part numbers and a source for the pitman arm and drag link on a 1989 Mack R688ST? Drag link is 15” long center to center. Pitman arm is 9” center to center. I have a bad feeling I already know the answer. Quote Link to comment https://www.bigmacktrucks.com/topic/72883-1989-mack-r688st-pitman-arm-and-drag-link/ Share on other sites More sharing options...
MACKS Posted May 23, 2023 Share Posted May 23, 2023 Try an E Mail to Stengel Bros with your vin number,forget about Mack dealer you’ll have to re morgage your home.. Quote Link to comment https://www.bigmacktrucks.com/topic/72883-1989-mack-r688st-pitman-arm-and-drag-link/#findComment-531860 Share on other sites More sharing options...
bigdaddyroyf2 Posted August 14 Share Posted August 14 Did you ever find anything out about your r model Pittman arm and drag link, we also have a r688st just like your and we need to find a new setup also. Quote Link to comment https://www.bigmacktrucks.com/topic/72883-1989-mack-r688st-pitman-arm-and-drag-link/#findComment-557003 Share on other sites More sharing options...
Supahonky Posted August 16 Share Posted August 16 I am in the same boat as of today! Does anyone know what pitman arm and drag link we could update to with tie rod style on both ends? Quote Link to comment https://www.bigmacktrucks.com/topic/72883-1989-mack-r688st-pitman-arm-and-drag-link/#findComment-557083 Share on other sites More sharing options...
mack88 Posted August 16 Share Posted August 16 mines a 87 had mine replaced as didnt pass saftey the shop didnt have any problems getting one Quote Link to comment https://www.bigmacktrucks.com/topic/72883-1989-mack-r688st-pitman-arm-and-drag-link/#findComment-557087 Share on other sites More sharing options...
convoyduel Posted August 20 Author Share Posted August 20 The part I used was a 9QC3220P2. It has a bit more of an angle outward but connected right in and works like a champ. Completely interchangeable with 11R22.5 steer tires. Can’t say if it works on larger/wider tires. The part was $497. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72883-1989-mack-r688st-pitman-arm-and-drag-link/#findComment-557381 Share on other sites More sharing options...
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