Instructions & Felt Seal List 2300/2400 Page 2
Exploded view of a turbo blower case assembly. For single stage blowers, there is no stationary vane and only one impeller.
INSTRUCTIONS FOR ASSEMBLY 1. Mount inner case to base.
SERVICING Case assemblies are identical for direct connected, V-belt, and coupled drive turbo blowers. A typical two-stage blower is shown. Single stage blowers use identical inner case and impeller but omit stationary vane and one impeller, and have a shallower outer case. Three-stage blowers use two stationary vanes, three impellers, and use a peripheral spacer between stationary vanes. INSTRUCTIONS FOR DISASSEMBLY 1. Remove intake guard.
2. Mount motor to base but do not tighten bolts.
3. Mount inner impeller on motor shaft and line up motor so flat side of impeller is 1/8 " away from inner case all around. Tighten motor bolts.
4. Tighten impeller hub screws. Use torque table on page 4 for impeller hub screws only
2. Remove case flange bolts and nuts.
5. Mount stationary vanes with case flange pins (prior to 2025 MFG date will have pins that serve as dowel pins for the stationary vanes during assembly) and drive them snugly into inner case. This step is not required and existing pins may remain or be removed
3. Remove outer case being careful not to bump impeller. (Felt seal should come off with outer case.)
4. Loosen impeller hub screws and remove impeller (and bushing, if any). CAUTION: Impellers are accurately balanced and should be handled with care. Grasp impellers by hubs only. 5. For some multistage blowers (prior to 2025 MFG date will have pins that serve as dowel pins for the stationary vanes during assembly) drive out the two case flange pins from the motor side to remove stationary vanes. These pins support vanes but are not critical to the operation. Felt seal should come off with stationary vanes, and pins may remain in the vanes.” 6. Remove impeller as in Step 4.
6. Mount impeller to shaft but do not tighten.
7. Mount outer case and bolt in place.
8. Slide impeller forward against inner side of outer case then back again 1/8 ". Tighten impeller hub screws. Use torque table on page 4 for impeller hub screws only.
9. Turn motor over several times by hand to check clearances.
10. Start motor and listen for clicking that would indicate misalignment of impellers. If this should occur, shut motor off immediately to prevent serious damage to impellers.
7. If necessary to remove inner case, make note of location of each shim and spacer.
11. Check rotation of impellers according to arrow on case.
8. Remove motor if required.
12. V-belt or coupled drive blowers must be checked after assembly for alignment of belts or couplings, to guard against excessive wear.
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